remove experimental performance counters

Unfortunately this impacted SMAPI's memory usage and the data was often misinterpreted by players.

16 files changed, 21 insertions, 1400 deletions

diff --git a/docs/release-notes.md b/docs/release-notes.md
index 9e2caba0..4c548924 100644
--- a/docs/release-notes.md
+++ b/docs/release-notes.md
@@ -9,7 +9,10 @@
 
 ## Upcoming release
 * For players:
-  * Slightly reduced memory usage.
+  * Reduced memory usage.
+
+* For the Console Commands mod:
+  * Removed experimental `performance` command. Unfortunately this impacted SMAPI's memory usage and the data was often misinterpreted. This may be replaced with more automatic performance alerts in a future version.
 
 ## 3.8.2
 Released 03 January 2021 for Stardew Valley 1.5.1 or later.
diff --git a/src/SMAPI.Mods.ConsoleCommands/Framework/Commands/ArgumentParser.cs b/src/SMAPI.Mods.ConsoleCommands/Framework/Commands/ArgumentParser.cs
index e84445d7..7e157c38 100644
--- a/src/SMAPI.Mods.ConsoleCommands/Framework/Commands/ArgumentParser.cs
+++ b/src/SMAPI.Mods.ConsoleCommands/Framework/Commands/ArgumentParser.cs
@@ -1,7 +1,6 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
-using System.Globalization;
 using System.Linq;
 
 namespace StardewModdingAPI.Mods.ConsoleCommands.Framework.Commands
@@ -107,38 +106,6 @@ namespace StardewModdingAPI.Mods.ConsoleCommands.Framework.Commands
             return true;
         }
 
-        /// <summary>Try to read a decimal argument.</summary>
-        /// <param name="index">The argument index.</param>
-        /// <param name="name">The argument name for error messages.</param>
-        /// <param name="value">The parsed value.</param>
-        /// <param name="required">Whether to show an error if the argument is missing.</param>
-        /// <param name="min">The minimum value allowed.</param>
-        /// <param name="max">The maximum value allowed.</param>
-        public bool TryGetDecimal(int index, string name, out decimal value, bool required = true, decimal? min = null, decimal? max = null)
-        {
-            value = 0;
-
-            // get argument
-            if (!this.TryGet(index, name, out string raw, required))
-                return false;
-
-            // parse
-            if (!decimal.TryParse(raw, NumberStyles.Number, CultureInfo.InvariantCulture, out value))
-            {
-                this.LogDecimalFormatError(index, name, min, max);
-                return false;
-            }
-
-            // validate
-            if ((min.HasValue && value < min) || (max.HasValue && value > max))
-            {
-                this.LogDecimalFormatError(index, name, min, max);
-                return false;
-            }
-
-            return true;
-        }
-
         /// <summary>Returns an enumerator that iterates through the collection.</summary>
         /// <returns>An enumerator that can be used to iterate through the collection.</returns>
         public IEnumerator<string> GetEnumerator()
@@ -180,22 +147,5 @@ namespace StardewModdingAPI.Mods.ConsoleCommands.Framework.Commands
             else
                 this.LogError($"Argument {index} ({name}) must be an integer.");
         }
-
-        /// <summary>Print an error for an invalid decimal argument.</summary>
-        /// <param name="index">The argument index.</param>
-        /// <param name="name">The argument name for error messages.</param>
-        /// <param name="min">The minimum value allowed.</param>
-        /// <param name="max">The maximum value allowed.</param>
-        private void LogDecimalFormatError(int index, string name, decimal? min, decimal? max)
-        {
-            if (min.HasValue && max.HasValue)
-                this.LogError($"Argument {index} ({name}) must be a decimal between {min} and {max}.");
-            else if (min.HasValue)
-                this.LogError($"Argument {index} ({name}) must be a decimal and at least {min}.");
-            else if (max.HasValue)
-                this.LogError($"Argument {index} ({name}) must be a decimal and at most {max}.");
-            else
-                this.LogError($"Argument {index} ({name}) must be a decimal.");
-        }
     }
 }
diff --git a/src/SMAPI.Mods.ConsoleCommands/Framework/Commands/Other/PerformanceCounterCommand.cs b/src/SMAPI.Mods.ConsoleCommands/Framework/Commands/Other/PerformanceCounterCommand.cs
deleted file mode 100644
index 63851c9d..00000000
--- a/src/SMAPI.Mods.ConsoleCommands/Framework/Commands/Other/PerformanceCounterCommand.cs
+++ /dev/null
@@ -1,647 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using StardewModdingAPI.Framework;
-using StardewModdingAPI.Framework.PerformanceMonitoring;
-
-namespace StardewModdingAPI.Mods.ConsoleCommands.Framework.Commands.Other
-{
-    /// <summary>A set of commands which displays or configures performance monitoring.</summary>
-    internal class PerformanceCounterCommand : TrainerCommand
-    {
-        /*********
-        ** Fields
-        *********/
-        /// <summary>The name of the command.</summary>
-        private const string CommandName = "performance";
-
-        /// <summary>The available commands.</summary>
-        private enum SubCommand
-        {
-            Summary,
-            Detail,
-            Reset,
-            Trigger,
-            Enable,
-            Disable,
-            Help
-        }
-
-
-        /*********
-        ** Public methods
-        *********/
-        /// <summary>Construct an instance.</summary>
-        public PerformanceCounterCommand()
-            : base(CommandName, PerformanceCounterCommand.GetDescription()) { }
-
-        /// <summary>Handle the command.</summary>
-        /// <param name="monitor">Writes messages to the console and log file.</param>
-        /// <param name="command">The command name.</param>
-        /// <param name="args">The command arguments.</param>
-        public override void Handle(IMonitor monitor, string command, ArgumentParser args)
-        {
-            // parse args
-            SubCommand subcommand = SubCommand.Summary;
-            {
-                if (args.TryGet(0, "command", out string subcommandStr, false) && !Enum.TryParse(subcommandStr, ignoreCase: true, out subcommand))
-                {
-                    this.LogUsageError(monitor, $"Unknown command {subcommandStr}");
-                    return;
-                }
-            }
-
-            // handle
-            switch (subcommand)
-            {
-                case SubCommand.Summary:
-                    this.HandleSummarySubCommand(monitor, args);
-                    break;
-
-                case SubCommand.Detail:
-                    this.HandleDetailSubCommand(monitor, args);
-                    break;
-
-                case SubCommand.Reset:
-                    this.HandleResetSubCommand(monitor, args);
-                    break;
-
-                case SubCommand.Trigger:
-                    this.HandleTriggerSubCommand(monitor, args);
-                    break;
-
-                case SubCommand.Enable:
-                    SCore.PerformanceMonitor.EnableTracking = true;
-                    monitor.Log("Performance counter tracking is now enabled", LogLevel.Info);
-                    break;
-
-                case SubCommand.Disable:
-                    SCore.PerformanceMonitor.EnableTracking = false;
-                    monitor.Log("Performance counter tracking is now disabled", LogLevel.Info);
-                    break;
-
-                case SubCommand.Help:
-                    this.OutputHelp(monitor, args.TryGet(1, "command", out _) ? subcommand : null as SubCommand?);
-                    break;
-
-                default:
-                    this.LogUsageError(monitor, $"Unknown command {subcommand}");
-                    break;
-            }
-        }
-
-
-        /*********
-        ** Private methods
-        *********/
-        /// <summary>Handles the summary sub command.</summary>
-        /// <param name="monitor">Writes messages to the console and log file.</param>
-        /// <param name="args">The command arguments.</param>
-        private void HandleSummarySubCommand(IMonitor monitor, ArgumentParser args)
-        {
-            if (!this.AssertEnabled(monitor))
-                return;
-
-            IEnumerable<PerformanceCounterCollection> data = SCore.PerformanceMonitor.GetCollections();
-
-            double? threshold = null;
-            if (args.TryGetDecimal(1, "threshold", out decimal t, required: false))
-                threshold = (double?)t;
-
-            TimeSpan interval = TimeSpan.FromSeconds(60);
-
-            StringBuilder report = new StringBuilder();
-            report.AppendLine($"Summary over the last {interval.TotalSeconds} seconds:");
-            report.AppendLine(this.GetTableString(
-                data: data,
-                header: new[] { "Collection", "Avg Calls/s", "Avg Exec Time (Game)", "Avg Exec Time (Mods)", "Avg Exec Time (Game+Mods)", "Peak Exec Time" },
-                getRow: item => new[]
-                {
-                    item.Name,
-                    item.GetAverageCallsPerSecond().ToString(),
-                    this.FormatMilliseconds(item.GetGameAverageExecutionTime(interval), threshold),
-                    this.FormatMilliseconds(item.GetModsAverageExecutionTime(interval), threshold),
-                    this.FormatMilliseconds(item.GetAverageExecutionTime(interval), threshold),
-                    this.FormatMilliseconds(item.GetPeakExecutionTime(interval), threshold)
-                },
-                true
-            ));
-
-            monitor.Log(report.ToString(), LogLevel.Info);
-        }
-
-        /// <summary>Handles the detail sub command.</summary>
-        /// <param name="monitor">Writes messages to the console and log file.</param>
-        /// <param name="args">The command arguments.</param>
-        private void HandleDetailSubCommand(IMonitor monitor, ArgumentParser args)
-        {
-            if (!this.AssertEnabled(monitor))
-                return;
-
-            // parse args
-            double thresholdMilliseconds = 0;
-            if (args.TryGetDecimal(1, "threshold", out decimal t, required: false))
-                thresholdMilliseconds = (double)t;
-
-            // get collections
-            var collections = SCore.PerformanceMonitor.GetCollections();
-
-            // render
-            TimeSpan averageInterval = TimeSpan.FromSeconds(60);
-            StringBuilder report = new StringBuilder($"Showing details for performance counters of {thresholdMilliseconds}+ milliseconds:\n\n");
-            bool anyShown = false;
-            foreach (PerformanceCounterCollection collection in collections)
-            {
-                KeyValuePair<string, PerformanceCounter>[] data = collection.PerformanceCounters
-                    .Where(p => p.Value.GetAverage(averageInterval) >= thresholdMilliseconds)
-                    .ToArray();
-
-                if (data.Any())
-                {
-                    anyShown = true;
-                    report.AppendLine($"{collection.Name}:");
-                    report.AppendLine(this.GetTableString(
-                        data: data,
-                        header: new[] { "Mod", $"Avg Exec Time (last {(int)averageInterval.TotalSeconds}s)", "Last Exec Time", "Peak Exec Time", $"Peak Exec Time (last {(int)averageInterval.TotalSeconds}s)" },
-                        getRow: item => new[]
-                        {
-                            item.Key,
-                            this.FormatMilliseconds(item.Value.GetAverage(averageInterval), thresholdMilliseconds),
-                            this.FormatMilliseconds(item.Value.GetLastEntry()?.ElapsedMilliseconds),
-                            this.FormatMilliseconds(item.Value.GetPeak()?.ElapsedMilliseconds),
-                            this.FormatMilliseconds(item.Value.GetPeak(averageInterval)?.ElapsedMilliseconds)
-                        },
-                        true
-                    ));
-                }
-            }
-
-            if (!anyShown)
-                report.AppendLine("No performance counters found.");
-
-            monitor.Log(report.ToString(), LogLevel.Info);
-        }
-
-        /// <summary>Handles the trigger sub command.</summary>
-        /// <param name="monitor">Writes messages to the console and log file.</param>
-        /// <param name="args">The command arguments.</param>
-        private void HandleTriggerSubCommand(IMonitor monitor, ArgumentParser args)
-        {
-            if (!this.AssertEnabled(monitor))
-                return;
-
-            if (args.TryGet(1, "mode", out string mode, false))
-            {
-                switch (mode)
-                {
-                    case "list":
-                        this.OutputAlertTriggers(monitor);
-                        break;
-
-                    case "collection":
-                        if (args.TryGet(2, "name", out string collectionName))
-                        {
-                            if (args.TryGetDecimal(3, "threshold", out decimal threshold))
-                            {
-                                if (!args.TryGet(4, "source", out string source, required: false))
-                                    source = null;
-                                this.ConfigureAlertTrigger(monitor, collectionName, source, threshold);
-                            }
-                        }
-                        break;
-
-                    case "pause":
-                        SCore.PerformanceMonitor.PauseAlerts = true;
-                        monitor.Log("Alerts are now paused.", LogLevel.Info);
-                        break;
-
-                    case "resume":
-                        SCore.PerformanceMonitor.PauseAlerts = false;
-                        monitor.Log("Alerts are now resumed.", LogLevel.Info);
-                        break;
-
-                    case "dump":
-                        this.OutputAlertTriggers(monitor, true);
-                        break;
-
-                    case "clear":
-                        this.ClearAlertTriggers(monitor);
-                        break;
-
-                    default:
-                        this.LogUsageError(monitor, $"Unknown mode {mode}. See '{CommandName} help trigger' for usage.");
-                        break;
-                }
-            }
-            else
-                this.OutputAlertTriggers(monitor);
-        }
-
-        /// <summary>Sets up an an alert trigger.</summary>
-        /// <param name="monitor">Writes messages to the console and log file.</param>
-        /// <param name="collectionName">The name of the collection.</param>
-        /// <param name="sourceName">The name of the source, or null for all sources.</param>
-        /// <param name="threshold">The trigger threshold, or 0 to remove.</param>
-        private void ConfigureAlertTrigger(IMonitor monitor, string collectionName, string sourceName, decimal threshold)
-        {
-            foreach (PerformanceCounterCollection collection in SCore.PerformanceMonitor.GetCollections())
-            {
-                if (collection.Name.ToLowerInvariant().Equals(collectionName.ToLowerInvariant()))
-                {
-                    if (sourceName == null)
-                    {
-                        if (threshold != 0)
-                        {
-                            collection.EnableAlerts = true;
-                            collection.AlertThresholdMilliseconds = (double)threshold;
-                            monitor.Log($"Set up alert triggering for '{collectionName}' with '{this.FormatMilliseconds((double?)threshold)}'", LogLevel.Info);
-                        }
-                        else
-                        {
-                            collection.EnableAlerts = false;
-                            monitor.Log($"Cleared alert triggering for '{collection}'.");
-                        }
-
-                        return;
-                    }
-                    else
-                    {
-                        foreach (var performanceCounter in collection.PerformanceCounters)
-                        {
-                            if (performanceCounter.Value.Source.ToLowerInvariant().Equals(sourceName.ToLowerInvariant()))
-                            {
-                                if (threshold != 0)
-                                {
-                                    performanceCounter.Value.EnableAlerts = true;
-                                    performanceCounter.Value.AlertThresholdMilliseconds = (double)threshold;
-                                    monitor.Log($"Set up alert triggering for '{sourceName}' in collection '{collectionName}' with '{this.FormatMilliseconds((double?)threshold)}", LogLevel.Info);
-                                }
-                                else
-                                    performanceCounter.Value.EnableAlerts = false;
-                                return;
-                            }
-                        }
-
-                        monitor.Log($"Could not find the source '{sourceName}' in collection '{collectionName}'", LogLevel.Warn);
-                        return;
-                    }
-                }
-            }
-
-            monitor.Log($"Could not find the collection '{collectionName}'", LogLevel.Warn);
-        }
-
-
-        /// <summary>Clears alert triggering for all collections.</summary>
-        /// <param name="monitor">Writes messages to the console and log file.</param>
-        private void ClearAlertTriggers(IMonitor monitor)
-        {
-            int clearedTriggers = 0;
-            foreach (PerformanceCounterCollection collection in SCore.PerformanceMonitor.GetCollections())
-            {
-                if (collection.EnableAlerts)
-                {
-                    collection.EnableAlerts = false;
-                    clearedTriggers++;
-                }
-
-                foreach (var performanceCounter in collection.PerformanceCounters)
-                {
-                    if (performanceCounter.Value.EnableAlerts)
-                    {
-                        performanceCounter.Value.EnableAlerts = false;
-                        clearedTriggers++;
-                    }
-                }
-
-            }
-
-            monitor.Log($"Cleared {clearedTriggers} alert triggers.", LogLevel.Info);
-        }
-
-        /// <summary>Lists all configured alert triggers.</summary>
-        /// <param name="monitor">Writes messages to the console and log file.</param>
-        /// <param name="asDump">True to dump the triggers as commands.</param>
-        private void OutputAlertTriggers(IMonitor monitor, bool asDump = false)
-        {
-            StringBuilder report = new StringBuilder();
-            report.AppendLine("Configured triggers:");
-            report.AppendLine();
-            var collectionTriggers = new List<CollectionTrigger>();
-            var sourceTriggers = new List<SourceTrigger>();
-
-            foreach (PerformanceCounterCollection collection in SCore.PerformanceMonitor.GetCollections())
-            {
-                if (collection.EnableAlerts)
-                    collectionTriggers.Add(new CollectionTrigger(collection.Name, collection.AlertThresholdMilliseconds));
-
-                sourceTriggers.AddRange(
-                    from counter in collection.PerformanceCounters
-                    where counter.Value.EnableAlerts
-                    select new SourceTrigger(collection.Name, counter.Value.Source, counter.Value.AlertThresholdMilliseconds)
-                );
-            }
-
-            if (collectionTriggers.Count > 0)
-            {
-                report.AppendLine("Collection Triggers:");
-                report.AppendLine();
-
-                if (asDump)
-                {
-                    foreach (var item in collectionTriggers)
-                        report.AppendLine($"{CommandName} trigger {item.CollectionName} {item.Threshold}");
-                }
-                else
-                {
-                    report.AppendLine(this.GetTableString(
-                        data: collectionTriggers,
-                        header: new[] { "Collection", "Threshold" },
-                        getRow: item => new[] { item.CollectionName, this.FormatMilliseconds(item.Threshold) },
-                        true
-                    ));
-                }
-
-                report.AppendLine();
-            }
-            else
-                report.AppendLine("No collection triggers.");
-
-            if (sourceTriggers.Count > 0)
-            {
-                report.AppendLine("Source Triggers:");
-                report.AppendLine();
-
-                if (asDump)
-                {
-                    foreach (SourceTrigger item in sourceTriggers)
-                        report.AppendLine($"{CommandName} trigger {item.CollectionName} {item.Threshold} {item.SourceName}");
-                }
-                else
-                {
-                    report.AppendLine(this.GetTableString(
-                        data: sourceTriggers,
-                        header: new[] { "Collection", "Source", "Threshold" },
-                        getRow: item => new[] { item.CollectionName, item.SourceName, this.FormatMilliseconds(item.Threshold) },
-                        true
-                    ));
-                }
-
-                report.AppendLine();
-            }
-            else
-                report.AppendLine("No source triggers.");
-
-            monitor.Log(report.ToString(), LogLevel.Info);
-        }
-
-        /// <summary>Handles the reset sub command.</summary>
-        /// <param name="monitor">Writes messages to the console and log file.</param>
-        /// <param name="args">The command arguments.</param>
-        private void HandleResetSubCommand(IMonitor monitor, ArgumentParser args)
-        {
-            if (!this.AssertEnabled(monitor))
-                return;
-
-            if (args.TryGet(1, "type", out string type, false, new[] { "category", "source" }))
-            {
-                args.TryGet(2, "name", out string name);
-
-                switch (type)
-                {
-                    case "category":
-                        SCore.PerformanceMonitor.ResetCollection(name);
-                        monitor.Log($"All performance counters for category {name} are now cleared.", LogLevel.Info);
-                        break;
-                    case "source":
-                        SCore.PerformanceMonitor.ResetSource(name);
-                        monitor.Log($"All performance counters for source {name} are now cleared.", LogLevel.Info);
-                        break;
-                }
-            }
-            else
-            {
-                SCore.PerformanceMonitor.Reset();
-                monitor.Log("All performance counters are now cleared.", LogLevel.Info);
-            }
-        }
-
-        /// <summary>Formats the given milliseconds value into a string format. Optionally
-        /// allows a threshold to return "-" if the value is less than the threshold.</summary>
-        /// <param name="milliseconds">The milliseconds to format. Returns "-" if null</param>
-        /// <param name="thresholdMilliseconds">The threshold. Any value below this is returned as "-".</param>
-        /// <returns>The formatted milliseconds.</returns>
-        private string FormatMilliseconds(double? milliseconds, double? thresholdMilliseconds = null)
-        {
-            thresholdMilliseconds ??= 1;
-            return milliseconds != null && milliseconds >= thresholdMilliseconds
-                   ? ((double)milliseconds).ToString("F2")
-                   : "-";
-        }
-
-        /// <summary>Shows detailed help for a specific sub command.</summary>
-        /// <param name="monitor">The output monitor.</param>
-        /// <param name="subcommand">The subcommand.</param>
-        private void OutputHelp(IMonitor monitor, SubCommand? subcommand)
-        {
-            StringBuilder report = new StringBuilder();
-            report.AppendLine();
-
-            switch (subcommand)
-            {
-                case SubCommand.Detail:
-                    report.AppendLine($"       {CommandName} detail <threshold>");
-                    report.AppendLine();
-                    report.AppendLine("Displays details for a specific collection.");
-                    report.AppendLine();
-                    report.AppendLine("Arguments:");
-                    report.AppendLine("  <threshold>   Optional. The threshold in milliseconds. Any average execution time below that");
-                    report.AppendLine("                threshold is not reported.");
-                    report.AppendLine();
-                    report.AppendLine("Examples:");
-                    report.AppendLine($"{CommandName} detail 5     Show counters exceeding an average of 5ms");
-                    break;
-
-                case SubCommand.Summary:
-                    report.AppendLine($"Usage: {CommandName} summary <threshold>");
-                    report.AppendLine();
-                    report.AppendLine("Displays the performance counter summary.");
-                    report.AppendLine();
-                    report.AppendLine("Arguments:");
-                    report.AppendLine("  <threshold> Optional. Hides the actual execution time if it's below this threshold");
-                    report.AppendLine();
-                    report.AppendLine("Examples:");
-                    report.AppendLine($"{CommandName} summary       Show all events");
-                    report.AppendLine($"{CommandName} summary 5     Shows events exceeding an average of 5ms");
-                    break;
-
-                case SubCommand.Trigger:
-                    report.AppendLine($"Usage: {CommandName} trigger <mode>");
-                    report.AppendLine($"Usage: {CommandName} trigger collection <collectionName> <threshold>");
-                    report.AppendLine($"Usage: {CommandName} trigger collection <collectionName> <threshold> <sourceName>");
-                    report.AppendLine();
-                    report.AppendLine("Manages alert triggers.");
-                    report.AppendLine();
-                    report.AppendLine("Arguments:");
-                    report.AppendLine("  <mode>           Optional. Specifies if a specific source or a specific collection should be triggered.");
-                    report.AppendLine("                   - list        Lists current triggers");
-                    report.AppendLine("                   - collection  Sets up a trigger for a collection");
-                    report.AppendLine("                   - clear       Clears all trigger entries");
-                    report.AppendLine("                   - pause       Pauses triggering of alerts");
-                    report.AppendLine("                   - resume      Resumes triggering of alerts");
-                    report.AppendLine("                   - dump        Dumps all triggers as commands for copy and paste");
-                    report.AppendLine("                   Defaults to 'list' if not specified.");
-                    report.AppendLine();
-                    report.AppendLine("  <collectionName> Required if the mode 'collection' is specified.");
-                    report.AppendLine("                   Specifies the name of the collection to be triggered. Must be an exact match.");
-                    report.AppendLine();
-                    report.AppendLine("  <sourceName>     Optional. Specifies the name of a specific source. Must be an exact match.");
-                    report.AppendLine();
-                    report.AppendLine("  <threshold>      Required if the mode 'collection' is specified.");
-                    report.AppendLine("                   Specifies the threshold in milliseconds (fractions allowed).");
-                    report.AppendLine("                   Specify '0' to remove the threshold.");
-                    report.AppendLine();
-                    report.AppendLine("Examples:");
-                    report.AppendLine();
-                    report.AppendLine($"{CommandName} trigger collection Display.Rendering 10");
-                    report.AppendLine("  Sets up an alert trigger which writes on the console if the execution time of all performance counters in");
-                    report.AppendLine("  the 'Display.Rendering' collection exceed 10 milliseconds.");
-                    report.AppendLine();
-                    report.AppendLine($"{CommandName} trigger collection Display.Rendering 5 Pathoschild.ChestsAnywhere");
-                    report.AppendLine("  Sets up an alert trigger to write on the console if the execution time of Pathoschild.ChestsAnywhere in");
-                    report.AppendLine("  the 'Display.Rendering' collection exceed 5 milliseconds.");
-                    report.AppendLine();
-                    report.AppendLine($"{CommandName} trigger collection Display.Rendering 0");
-                    report.AppendLine("  Removes the threshold previously defined from the collection. Note that source-specific thresholds are left intact.");
-                    report.AppendLine();
-                    report.AppendLine($"{CommandName} trigger clear");
-                    report.AppendLine("  Clears all previously setup alert triggers.");
-                    break;
-
-                case SubCommand.Reset:
-                    report.AppendLine($"Usage: {CommandName} reset <type> <name>");
-                    report.AppendLine();
-                    report.AppendLine("Resets performance counters.");
-                    report.AppendLine();
-                    report.AppendLine("Arguments:");
-                    report.AppendLine("  <type>  Optional. Specifies if a collection or source should be reset.");
-                    report.AppendLine("          If omitted, all performance counters are reset.");
-                    report.AppendLine();
-                    report.AppendLine("          - source     Clears performance counters for a specific source");
-                    report.AppendLine("          - collection Clears performance counters for a specific collection");
-                    report.AppendLine();
-                    report.AppendLine("  <name>  Required if a <type> is given. Specifies the name of either the collection");
-                    report.AppendLine("          or the source. The name must be an exact match.");
-                    report.AppendLine();
-                    report.AppendLine("Examples:");
-                    report.AppendLine($"{CommandName} reset                                    Resets all performance counters");
-                    report.AppendLine($"{CommandName} reset source Pathoschild.ChestsAnywhere  Resets all performance for the source named Pathoschild.ChestsAnywhere");
-                    report.AppendLine($"{CommandName} reset collection Display.Rendering       Resets all performance for the collection named Display.Rendering");
-                    break;
-            }
-
-            report.AppendLine();
-            monitor.Log(report.ToString(), LogLevel.Info);
-        }
-
-        /// <summary>Get the command description.</summary>
-        private static string GetDescription()
-        {
-            StringBuilder report = new StringBuilder();
-
-            report.AppendLine("Displays or configures performance monitoring to diagnose issues. Performance monitoring is disabled by default.");
-            report.AppendLine();
-            report.AppendLine("For example, the counter collection named 'Display.Rendered' contains one performance");
-            report.AppendLine("counter when the game executes the 'Display.Rendered' event, and another counter for each mod which handles it.");
-            report.AppendLine();
-            report.AppendLine($"Usage: {CommandName} <command> <action>");
-            report.AppendLine();
-            report.AppendLine("Commands:");
-            report.AppendLine();
-            report.AppendLine("  summary    Show a summary of collections.");
-            report.AppendLine("  detail     Show a summary for a given collection.");
-            report.AppendLine("  reset      Reset all performance counters.");
-            report.AppendLine("  trigger    Configure alert triggers.");
-            report.AppendLine("  enable     Enable performance counter recording.");
-            report.AppendLine("  disable    Disable performance counter recording.");
-            report.AppendLine("  help       Show verbose help for the available commands.");
-            report.AppendLine();
-            report.AppendLine($"To get help for a specific command, use '{CommandName} help <command>', for example:");
-            report.AppendLine($"{CommandName} help summary");
-            report.AppendLine();
-            report.AppendLine("Defaults to summary if no command is given.");
-            report.AppendLine();
-
-            return report.ToString();
-        }
-
-        /// <summary>Log a warning if performance monitoring isn't enabled.</summary>
-        /// <param name="monitor">Writes messages to the console and log file.</param>
-        /// <returns>Returns whether performance monitoring is enabled.</returns>
-        private bool AssertEnabled(IMonitor monitor)
-        {
-            if (!SCore.PerformanceMonitor.EnableTracking)
-            {
-                monitor.Log($"Performance monitoring is currently disabled; enter '{CommandName} enable' to enable it.", LogLevel.Warn);
-                return false;
-            }
-
-            return true;
-        }
-
-
-        /*********
-        ** Private models
-        *********/
-        /// <summary>An alert trigger for a collection.</summary>
-        private class CollectionTrigger
-        {
-            /*********
-            ** Accessors
-            *********/
-            /// <summary>The collection name.</summary>
-            public string CollectionName { get; }
-
-            /// <summary>The trigger threshold.</summary>
-            public double Threshold { get; }
-
-
-            /*********
-            ** Public methods
-            *********/
-            /// <summary>Construct an instance.</summary>
-            /// <param name="collectionName">The collection name.</param>
-            /// <param name="threshold">The trigger threshold.</param>
-            public CollectionTrigger(string collectionName, double threshold)
-            {
-                this.CollectionName = collectionName;
-                this.Threshold = threshold;
-            }
-        }
-
-        /// <summary>An alert triggered for a source.</summary>
-        private class SourceTrigger : CollectionTrigger
-        {
-            /*********
-            ** Accessors
-            *********/
-            /// <summary>The source name.</summary>
-            public string SourceName { get; }
-
-
-            /*********
-            ** Public methods
-            *********/
-            /// <summary>Construct an instance.</summary>
-            /// <param name="collectionName">The collection name.</param>
-            /// <param name="sourceName">The source name.</param>
-            /// <param name="threshold">The trigger threshold.</param>
-            public SourceTrigger(string collectionName, string sourceName, double threshold)
-                : base(collectionName, threshold)
-            {
-                this.SourceName = sourceName;
-            }
-        }
-    }
-}
diff --git a/src/SMAPI.Mods.ConsoleCommands/Framework/Commands/TrainerCommand.cs b/src/SMAPI.Mods.ConsoleCommands/Framework/Commands/TrainerCommand.cs
index 77a26c6a..98daa906 100644
--- a/src/SMAPI.Mods.ConsoleCommands/Framework/Commands/TrainerCommand.cs
+++ b/src/SMAPI.Mods.ConsoleCommands/Framework/Commands/TrainerCommand.cs
@@ -78,8 +78,7 @@ namespace StardewModdingAPI.Mods.ConsoleCommands.Framework.Commands
         /// <param name="data">The data to display.</param>
         /// <param name="header">The table header.</param>
         /// <param name="getRow">Returns a set of fields for a data value.</param>
-        /// <param name="rightAlign">Whether to right-align the data.</param>
-        protected string GetTableString<T>(IEnumerable<T> data, string[] header, Func<T, string[]> getRow, bool rightAlign = false)
+        protected string GetTableString<T>(IEnumerable<T> data, string[] header, Func<T, string[]> getRow)
         {
             // get table data
             int[] widths = header.Select(p => p.Length).ToArray();
@@ -108,7 +107,7 @@ namespace StardewModdingAPI.Mods.ConsoleCommands.Framework.Commands
             return string.Join(
                 Environment.NewLine,
                 lines.Select(line => string.Join(" | ",
-                    line.Select((field, i) => rightAlign ? field.PadRight(widths[i], ' ') : field.PadLeft(widths[i], ' '))
+                    line.Select((field, i) => field.PadLeft(widths[i], ' '))
                 ))
             );
         }
diff --git a/src/SMAPI/Constants.cs b/src/SMAPI/Constants.cs
index ef996c0f..9816013c 100644
--- a/src/SMAPI/Constants.cs
+++ b/src/SMAPI/Constants.cs
@@ -97,9 +97,6 @@ namespace StardewModdingAPI
         /// <summary>The URL of the SMAPI home page.</summary>
         internal const string HomePageUrl = "https://smapi.io";
 
-        /// <summary>The default performance counter name for unknown event handlers.</summary>
-        internal const string GamePerformanceCounterName = "<StardewValley>";
-
         /// <summary>The absolute path to the folder containing SMAPI's internal files.</summary>
         internal static readonly string InternalFilesPath = EarlyConstants.InternalFilesPath;
 
diff --git a/src/SMAPI/Framework/Events/EventManager.cs b/src/SMAPI/Framework/Events/EventManager.cs
index 9092669f..665dbfe3 100644
--- a/src/SMAPI/Framework/Events/EventManager.cs
+++ b/src/SMAPI/Framework/Events/EventManager.cs
@@ -2,7 +2,6 @@ using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.Reflection;
 using StardewModdingAPI.Events;
-using StardewModdingAPI.Framework.PerformanceMonitoring;
 
 namespace StardewModdingAPI.Framework.Events
 {
@@ -178,13 +177,12 @@ namespace StardewModdingAPI.Framework.Events
         *********/
         /// <summary>Construct an instance.</summary>
         /// <param name="modRegistry">The mod registry with which to identify mods.</param>
-        /// <param name="performanceMonitor">Tracks performance metrics.</param>
-        public EventManager(ModRegistry modRegistry, PerformanceMonitor performanceMonitor)
+        public EventManager(ModRegistry modRegistry)
         {
             // create shortcut initializers
             ManagedEvent<TEventArgs> ManageEventOf<TEventArgs>(string typeName, string eventName, bool isPerformanceCritical = false)
             {
-                return new ManagedEvent<TEventArgs>($"{typeName}.{eventName}", modRegistry, performanceMonitor, isPerformanceCritical);
+                return new ManagedEvent<TEventArgs>($"{typeName}.{eventName}", modRegistry, isPerformanceCritical);
             }
 
             // init events (new)
diff --git a/src/SMAPI/Framework/Events/ManagedEvent.cs b/src/SMAPI/Framework/Events/ManagedEvent.cs
index f2dfb2ab..2204966c 100644
--- a/src/SMAPI/Framework/Events/ManagedEvent.cs
+++ b/src/SMAPI/Framework/Events/ManagedEvent.cs
@@ -3,7 +3,6 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Reflection;
 using StardewModdingAPI.Events;
-using StardewModdingAPI.Framework.PerformanceMonitoring;
 
 namespace StardewModdingAPI.Framework.Events
 {
@@ -17,9 +16,6 @@ namespace StardewModdingAPI.Framework.Events
         /// <summary>The mod registry with which to identify mods.</summary>
         protected readonly ModRegistry ModRegistry;
 
-        /// <summary>Tracks performance metrics.</summary>
-        private readonly PerformanceMonitor PerformanceMonitor;
-
         /// <summary>The underlying event handlers.</summary>
         private readonly List<ManagedEventHandler<TEventArgs>> Handlers = new List<ManagedEventHandler<TEventArgs>>();
 
@@ -49,13 +45,11 @@ namespace StardewModdingAPI.Framework.Events
         /// <summary>Construct an instance.</summary>
         /// <param name="eventName">A human-readable name for the event.</param>
         /// <param name="modRegistry">The mod registry with which to identify mods.</param>
-        /// <param name="performanceMonitor">Tracks performance metrics.</param>
         /// <param name="isPerformanceCritical">Whether the event is typically called at least once per second.</param>
-        public ManagedEvent(string eventName, ModRegistry modRegistry, PerformanceMonitor performanceMonitor, bool isPerformanceCritical = false)
+        public ManagedEvent(string eventName, ModRegistry modRegistry, bool isPerformanceCritical = false)
         {
             this.EventName = eventName;
             this.ModRegistry = modRegistry;
-            this.PerformanceMonitor = performanceMonitor;
             this.IsPerformanceCritical = isPerformanceCritical;
         }
 
@@ -126,40 +120,26 @@ namespace StardewModdingAPI.Framework.Events
             }
 
             // raise event
-            this.PerformanceMonitor.Track(this.EventName, () =>
+            foreach (ManagedEventHandler<TEventArgs> handler in handlers)
             {
-                foreach (ManagedEventHandler<TEventArgs> handler in handlers)
-                {
-                    if (match != null && !match(handler.SourceMod))
-                        continue;
+                if (match != null && !match(handler.SourceMod))
+                    continue;
 
-                    try
-                    {
-                        this.PerformanceMonitor.Track(this.EventName, this.GetModNameForPerformanceCounters(handler), () => handler.Handler.Invoke(null, args));
-                    }
-                    catch (Exception ex)
-                    {
-                        this.LogError(handler, ex);
-                    }
+                try
+                {
+                    handler.Handler.Invoke(null, args);
+                }
+                catch (Exception ex)
+                {
+                    this.LogError(handler, ex);
                 }
-            });
+            }
         }
 
 
         /*********
         ** Private methods
         *********/
-        /// <summary>Get the mod name for a given event handler to display in performance monitoring reports.</summary>
-        /// <param name="handler">The event handler.</param>
-        private string GetModNameForPerformanceCounters(ManagedEventHandler<TEventArgs> handler)
-        {
-            IModMetadata mod = handler.SourceMod;
-
-            return mod.HasManifest()
-                ? mod.Manifest.UniqueID
-                : mod.DisplayName;
-        }
-
         /// <summary>Log an exception from an event handler.</summary>
         /// <param name="handler">The event handler instance.</param>
         /// <param name="ex">The exception that was raised.</param>
diff --git a/src/SMAPI/Framework/PerformanceMonitoring/AlertContext.cs b/src/SMAPI/Framework/PerformanceMonitoring/AlertContext.cs
deleted file mode 100644
index af630055..00000000
--- a/src/SMAPI/Framework/PerformanceMonitoring/AlertContext.cs
+++ /dev/null
@@ -1,34 +0,0 @@
-namespace StardewModdingAPI.Framework.PerformanceMonitoring
-{
-    /// <summary>The context for an alert.</summary>
-    internal readonly struct AlertContext
-    {
-        /*********
-        ** Accessors
-        *********/
-        /// <summary>The source which triggered the alert.</summary>
-        public string Source { get; }
-
-        /// <summary>The elapsed milliseconds.</summary>
-        public double Elapsed { get; }
-
-
-        /*********
-        ** Public methods
-        *********/
-        /// <summary>Construct an instance.</summary>
-        /// <param name="source">The source which triggered the alert.</param>
-        /// <param name="elapsed">The elapsed milliseconds.</param>
-        public AlertContext(string source, double elapsed)
-        {
-            this.Source = source;
-            this.Elapsed = elapsed;
-        }
-
-        /// <summary>Get a human-readable text form of this instance.</summary>
-        public override string ToString()
-        {
-            return $"{this.Source}: {this.Elapsed:F2}ms";
-        }
-    }
-}
diff --git a/src/SMAPI/Framework/PerformanceMonitoring/AlertEntry.cs b/src/SMAPI/Framework/PerformanceMonitoring/AlertEntry.cs
deleted file mode 100644
index d5a0b343..00000000
--- a/src/SMAPI/Framework/PerformanceMonitoring/AlertEntry.cs
+++ /dev/null
@@ -1,38 +0,0 @@
-namespace StardewModdingAPI.Framework.PerformanceMonitoring
-{
-    /// <summary>A single alert entry.</summary>
-    internal readonly struct AlertEntry
-    {
-        /*********
-        ** Accessors
-        *********/
-        /// <summary>The collection in which the alert occurred.</summary>
-        public PerformanceCounterCollection Collection { get; }
-
-        /// <summary>The actual execution time in milliseconds.</summary>
-        public double ExecutionTimeMilliseconds { get; }
-
-        /// <summary>The configured alert threshold in milliseconds.</summary>
-        public double ThresholdMilliseconds { get; }
-
-        /// <summary>The sources involved in exceeding the threshold.</summary>
-        public AlertContext[] Context { get; }
-
-
-        /*********
-        ** Public methods
-        *********/
-        /// <summary>Construct an instance.</summary>
-        /// <param name="collection">The collection in which the alert occurred.</param>
-        /// <param name="executionTimeMilliseconds">The actual execution time in milliseconds.</param>
-        /// <param name="thresholdMilliseconds">The configured alert threshold in milliseconds.</param>
-        /// <param name="context">The sources involved in exceeding the threshold.</param>
-        public AlertEntry(PerformanceCounterCollection collection, double executionTimeMilliseconds, double thresholdMilliseconds, AlertContext[] context)
-        {
-            this.Collection = collection;
-            this.ExecutionTimeMilliseconds = executionTimeMilliseconds;
-            this.ThresholdMilliseconds = thresholdMilliseconds;
-            this.Context = context;
-        }
-    }
-}
diff --git a/src/SMAPI/Framework/PerformanceMonitoring/PeakEntry.cs b/src/SMAPI/Framework/PerformanceMonitoring/PeakEntry.cs
deleted file mode 100644
index 1746e358..00000000
--- a/src/SMAPI/Framework/PerformanceMonitoring/PeakEntry.cs
+++ /dev/null
@@ -1,35 +0,0 @@
-using System;
-
-namespace StardewModdingAPI.Framework.PerformanceMonitoring
-{
-    /// <summary>A peak invocation time.</summary>
-    internal readonly struct PeakEntry
-    {
-        /*********
-        ** Accessors
-        *********/
-        /// <summary>The actual execution time in milliseconds.</summary>
-        public double ExecutionTimeMilliseconds { get; }
-
-        /// <summary>When the entry occurred.</summary>
-        public DateTime EventTime { get; }
-
-        /// <summary>The sources involved in exceeding the threshold.</summary>
-        public AlertContext[] Context { get; }
-
-
-        /*********
-        ** Public methods
-        *********/
-        /// <summary>Construct an instance.</summary>
-        /// <param name="executionTimeMilliseconds">The actual execution time in milliseconds.</param>
-        /// <param name="eventTime">When the entry occurred.</param>
-        /// <param name="context">The sources involved in exceeding the threshold.</param>
-        public PeakEntry(double executionTimeMilliseconds, DateTime eventTime, AlertContext[] context)
-        {
-            this.ExecutionTimeMilliseconds = executionTimeMilliseconds;
-            this.EventTime = eventTime;
-            this.Context = context;
-        }
-    }
-}
diff --git a/src/SMAPI/Framework/PerformanceMonitoring/PerformanceCounter.cs b/src/SMAPI/Framework/PerformanceMonitoring/PerformanceCounter.cs
deleted file mode 100644
index 42825999..00000000
--- a/src/SMAPI/Framework/PerformanceMonitoring/PerformanceCounter.cs
+++ /dev/null
@@ -1,124 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
-namespace StardewModdingAPI.Framework.PerformanceMonitoring
-{
-    /// <summary>Tracks metadata about a particular code event.</summary>
-    internal class PerformanceCounter
-    {
-        /*********
-        ** Fields
-        *********/
-        /// <summary>The size of the ring buffer.</summary>
-        private readonly int MaxEntries = 16384;
-
-        /// <summary>The collection to which this performance counter belongs.</summary>
-        private readonly PerformanceCounterCollection ParentCollection;
-
-        /// <summary>The performance counter entries.</summary>
-        private readonly Stack<PerformanceCounterEntry> Entries;
-
-        /// <summary>The entry with the highest execution time.</summary>
-        private PerformanceCounterEntry? PeakPerformanceCounterEntry;
-
-
-        /*********
-        ** Accessors
-        *********/
-        /// <summary>The name of the source.</summary>
-        public string Source { get; }
-
-        /// <summary>The alert threshold in milliseconds</summary>
-        public double AlertThresholdMilliseconds { get; set; }
-
-        /// <summary>If alerting is enabled or not</summary>
-        public bool EnableAlerts { get; set; }
-
-
-        /*********
-        ** Public methods
-        *********/
-        /// <summary>Construct an instance.</summary>
-        /// <param name="parentCollection">The collection to which this performance counter belongs.</param>
-        /// <param name="source">The name of the source.</param>
-        public PerformanceCounter(PerformanceCounterCollection parentCollection, string source)
-        {
-            this.ParentCollection = parentCollection;
-            this.Source = source;
-            this.Entries = new Stack<PerformanceCounterEntry>(this.MaxEntries);
-        }
-
-        /// <summary>Add a performance counter entry to the list, update monitoring, and raise alerts if needed.</summary>
-        /// <param name="entry">The entry to add.</param>
-        public void Add(PerformanceCounterEntry entry)
-        {
-            // add entry
-            if (this.Entries.Count > this.MaxEntries)
-                this.Entries.Pop();
-            this.Entries.Push(entry);
-
-            // update metrics
-            if (this.PeakPerformanceCounterEntry == null || entry.ElapsedMilliseconds > this.PeakPerformanceCounterEntry.Value.ElapsedMilliseconds)
-                this.PeakPerformanceCounterEntry = entry;
-
-            // raise alert
-            if (this.EnableAlerts && entry.ElapsedMilliseconds > this.AlertThresholdMilliseconds)
-                this.ParentCollection.AddAlert(entry.ElapsedMilliseconds, this.AlertThresholdMilliseconds, new AlertContext(this.Source, entry.ElapsedMilliseconds));
-        }
-
-        /// <summary>Clear all performance counter entries and monitoring.</summary>
-        public void Reset()
-        {
-            this.Entries.Clear();
-            this.PeakPerformanceCounterEntry = null;
-        }
-
-        /// <summary>Get the peak entry.</summary>
-        public PerformanceCounterEntry? GetPeak()
-        {
-            return this.PeakPerformanceCounterEntry;
-        }
-
-        /// <summary>Get the entry with the highest execution time.</summary>
-        /// <param name="range">The time range to search.</param>
-        /// <param name="endTime">The end time for the <paramref name="range"/>, or null for the current time.</param>
-        public PerformanceCounterEntry? GetPeak(TimeSpan range, DateTime? endTime = null)
-        {
-            endTime ??= DateTime.UtcNow;
-            DateTime startTime = endTime.Value.Subtract(range);
-
-            return this.Entries
-                .Where(entry => entry.EventTime >= startTime && entry.EventTime <= endTime)
-                .OrderByDescending(x => x.ElapsedMilliseconds)
-                .FirstOrDefault();
-        }
-
-        /// <summary>Get the last entry added to the list.</summary>
-        public PerformanceCounterEntry? GetLastEntry()
-        {
-            if (this.Entries.Count == 0)
-                return null;
-
-            return this.Entries.Peek();
-        }
-
-        /// <summary>Get the average over a given time span.</summary>
-        /// <param name="range">The time range to search.</param>
-        /// <param name="endTime">The end time for the <paramref name="range"/>, or null for the current time.</param>
-        public double GetAverage(TimeSpan range, DateTime? endTime = null)
-        {
-            endTime ??= DateTime.UtcNow;
-            DateTime startTime = endTime.Value.Subtract(range);
-
-            double[] entries = this.Entries
-                .Where(entry => entry.EventTime >= startTime && entry.EventTime <= endTime)
-                .Select(p => p.ElapsedMilliseconds)
-                .ToArray();
-
-            return entries.Length > 0
-                ? entries.Average()
-                : 0;
-        }
-    }
-}
diff --git a/src/SMAPI/Framework/PerformanceMonitoring/PerformanceCounterCollection.cs b/src/SMAPI/Framework/PerformanceMonitoring/PerformanceCounterCollection.cs
deleted file mode 100644
index 29a06794..00000000
--- a/src/SMAPI/Framework/PerformanceMonitoring/PerformanceCounterCollection.cs
+++ /dev/null
@@ -1,205 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Linq;
-
-namespace StardewModdingAPI.Framework.PerformanceMonitoring
-{
-    internal class PerformanceCounterCollection
-    {
-        /*********
-        ** Fields
-        *********/
-        /// <summary>The number of peak invocations to keep.</summary>
-        private readonly int MaxEntries = 16384;
-
-        /// <summary>The sources involved in exceeding alert thresholds.</summary>
-        private readonly List<AlertContext> TriggeredPerformanceCounters = new List<AlertContext>();
-
-        /// <summary>The stopwatch used to track the invocation time.</summary>
-        private readonly Stopwatch InvocationStopwatch = new Stopwatch();
-
-        /// <summary>The performance counter manager.</summary>
-        private readonly PerformanceMonitor PerformanceMonitor;
-
-        /// <summary>The time to calculate average calls per second.</summary>
-        private DateTime CallsPerSecondStart = DateTime.UtcNow;
-
-        /// <summary>The number of invocations.</summary>
-        private long CallCount;
-
-        /// <summary>The peak invocations.</summary>
-        private readonly Stack<PeakEntry> PeakInvocations;
-
-
-        /*********
-        ** Accessors
-        *********/
-        /// <summary>The associated performance counters.</summary>
-        public IDictionary<string, PerformanceCounter> PerformanceCounters { get; } = new Dictionary<string, PerformanceCounter>();
-
-        /// <summary>The name of this collection.</summary>
-        public string Name { get; }
-
-        /// <summary>Whether the source is typically invoked at least once per second.</summary>
-        public bool IsPerformanceCritical { get; }
-
-        /// <summary>The alert threshold in milliseconds.</summary>
-        public double AlertThresholdMilliseconds { get; set; }
-
-        /// <summary>Whether alerts are enabled.</summary>
-        public bool EnableAlerts { get; set; }
-
-
-        /*********
-        ** Public methods
-        *********/
-        /// <summary>Construct an instance.</summary>
-        /// <param name="performanceMonitor">The performance counter manager.</param>
-        /// <param name="name">The name of this collection.</param>
-        /// <param name="isPerformanceCritical">Whether the source is typically invoked at least once per second.</param>
-        public PerformanceCounterCollection(PerformanceMonitor performanceMonitor, string name, bool isPerformanceCritical = false)
-        {
-            this.PeakInvocations = new Stack<PeakEntry>(this.MaxEntries);
-            this.Name = name;
-            this.PerformanceMonitor = performanceMonitor;
-            this.IsPerformanceCritical = isPerformanceCritical;
-        }
-
-        /// <summary>Track a single invocation for a named source.</summary>
-        /// <param name="source">The name of the source.</param>
-        /// <param name="entry">The entry.</param>
-        public void Track(string source, PerformanceCounterEntry entry)
-        {
-            // add entry
-            if (!this.PerformanceCounters.ContainsKey(source))
-                this.PerformanceCounters.Add(source, new PerformanceCounter(this, source));
-            this.PerformanceCounters[source].Add(entry);
-
-            // raise alert
-            if (this.EnableAlerts)
-                this.TriggeredPerformanceCounters.Add(new AlertContext(source, entry.ElapsedMilliseconds));
-        }
-
-        /// <summary>Get the average execution time for all non-game internal sources in milliseconds.</summary>
-        /// <param name="interval">The interval for which to get the average, relative to now</param>
-        public double GetModsAverageExecutionTime(TimeSpan interval)
-        {
-            return this.PerformanceCounters
-                .Where(entry => entry.Key != Constants.GamePerformanceCounterName)
-                .Sum(entry => entry.Value.GetAverage(interval));
-        }
-
-        /// <summary>Get the overall average execution time in milliseconds.</summary>
-        /// <param name="interval">The interval for which to get the average, relative to now</param>
-        public double GetAverageExecutionTime(TimeSpan interval)
-        {
-            return this.PerformanceCounters
-                .Sum(entry => entry.Value.GetAverage(interval));
-        }
-
-        /// <summary>Get the average execution time for game-internal sources in milliseconds.</summary>
-        public double GetGameAverageExecutionTime(TimeSpan interval)
-        {
-            return this.PerformanceCounters.TryGetValue(Constants.GamePerformanceCounterName, out PerformanceCounter gameExecTime)
-                ? gameExecTime.GetAverage(interval)
-                : 0;
-        }
-
-        /// <summary>Get the peak execution time in milliseconds.</summary>
-        /// <param name="range">The time range to search.</param>
-        /// <param name="endTime">The end time for the <paramref name="range"/>, or null for the current time.</param>
-        public double GetPeakExecutionTime(TimeSpan range, DateTime? endTime = null)
-        {
-            if (this.PeakInvocations.Count == 0)
-                return 0;
-
-            endTime ??= DateTime.UtcNow;
-            DateTime startTime = endTime.Value.Subtract(range);
-
-            return this.PeakInvocations
-                .Where(entry => entry.EventTime >= startTime && entry.EventTime <= endTime)
-                .OrderByDescending(x => x.ExecutionTimeMilliseconds)
-                .Select(p => p.ExecutionTimeMilliseconds)
-                .FirstOrDefault();
-        }
-
-        /// <summary>Start tracking the invocation of this collection.</summary>
-        public void BeginTrackInvocation()
-        {
-            this.TriggeredPerformanceCounters.Clear();
-            this.InvocationStopwatch.Reset();
-            this.InvocationStopwatch.Start();
-
-            this.CallCount++;
-        }
-
-        /// <summary>End tracking the invocation of this collection, and raise an alert if needed.</summary>
-        public void EndTrackInvocation()
-        {
-            this.InvocationStopwatch.Stop();
-
-            // add invocation
-            if (this.PeakInvocations.Count >= this.MaxEntries)
-                this.PeakInvocations.Pop();
-            this.PeakInvocations.Push(new PeakEntry(this.InvocationStopwatch.Elapsed.TotalMilliseconds, DateTime.UtcNow, this.TriggeredPerformanceCounters.ToArray()));
-
-            // raise alert
-            if (this.EnableAlerts && this.InvocationStopwatch.Elapsed.TotalMilliseconds >= this.AlertThresholdMilliseconds)
-                this.AddAlert(this.InvocationStopwatch.Elapsed.TotalMilliseconds, this.AlertThresholdMilliseconds, this.TriggeredPerformanceCounters.ToArray());
-        }
-
-        /// <summary>Add an alert.</summary>
-        /// <param name="executionTimeMilliseconds">The execution time in milliseconds.</param>
-        /// <param name="thresholdMilliseconds">The configured threshold.</param>
-        /// <param name="alerts">The sources involved in exceeding the threshold.</param>
-        public void AddAlert(double executionTimeMilliseconds, double thresholdMilliseconds, AlertContext[] alerts)
-        {
-            this.PerformanceMonitor.AddAlert(
-                new AlertEntry(this, executionTimeMilliseconds, thresholdMilliseconds, alerts)
-            );
-        }
-
-        /// <summary>Add an alert.</summary>
-        /// <param name="executionTimeMilliseconds">The execution time in milliseconds.</param>
-        /// <param name="thresholdMilliseconds">The configured threshold.</param>
-        /// <param name="alert">The source involved in exceeding the threshold.</param>
-        public void AddAlert(double executionTimeMilliseconds, double thresholdMilliseconds, AlertContext alert)
-        {
-            this.AddAlert(executionTimeMilliseconds, thresholdMilliseconds, new[] { alert });
-        }
-
-        /// <summary>Reset the calls per second counter.</summary>
-        public void ResetCallsPerSecond()
-        {
-            this.CallCount = 0;
-            this.CallsPerSecondStart = DateTime.UtcNow;
-        }
-
-        /// <summary>Reset all performance counters in this collection.</summary>
-        public void Reset()
-        {
-            this.PeakInvocations.Clear();
-            foreach (var counter in this.PerformanceCounters)
-                counter.Value.Reset();
-        }
-
-        /// <summary>Reset the performance counter for a specific source.</summary>
-        /// <param name="source">The source name.</param>
-        public void ResetSource(string source)
-        {
-            foreach (var i in this.PerformanceCounters)
-                if (i.Value.Source.Equals(source, StringComparison.OrdinalIgnoreCase))
-                    i.Value.Reset();
-        }
-
-        /// <summary>Get the average calls per second.</summary>
-        public long GetAverageCallsPerSecond()
-        {
-            long runtimeInSeconds = (long)DateTime.UtcNow.Subtract(this.CallsPerSecondStart).TotalSeconds;
-            return runtimeInSeconds > 0
-                ? this.CallCount / runtimeInSeconds
-                : 0;
-        }
-    }
-}
diff --git a/src/SMAPI/Framework/PerformanceMonitoring/PerformanceCounterEntry.cs b/src/SMAPI/Framework/PerformanceMonitoring/PerformanceCounterEntry.cs
deleted file mode 100644
index 18cca628..00000000
--- a/src/SMAPI/Framework/PerformanceMonitoring/PerformanceCounterEntry.cs
+++ /dev/null
@@ -1,30 +0,0 @@
-using System;
-
-namespace StardewModdingAPI.Framework.PerformanceMonitoring
-{
-    /// <summary>A single performance counter entry.</summary>
-    internal readonly struct PerformanceCounterEntry
-    {
-        /*********
-        ** Accessors
-        *********/
-        /// <summary>When the entry occurred.</summary>
-        public DateTime EventTime { get; }
-
-        /// <summary>The elapsed milliseconds.</summary>
-        public double ElapsedMilliseconds { get; }
-
-
-        /*********
-        ** Public methods
-        *********/
-        /// <summary>Construct an instance.</summary>
-        /// <param name="eventTime">When the entry occurred.</param>
-        /// <param name="elapsedMilliseconds">The elapsed milliseconds.</param>
-        public PerformanceCounterEntry(DateTime eventTime, double elapsedMilliseconds)
-        {
-            this.EventTime = eventTime;
-            this.ElapsedMilliseconds = elapsedMilliseconds;
-        }
-    }
-}
diff --git a/src/SMAPI/Framework/PerformanceMonitoring/PerformanceMonitor.cs b/src/SMAPI/Framework/PerformanceMonitoring/PerformanceMonitor.cs
deleted file mode 100644
index 3f2608aa..00000000
--- a/src/SMAPI/Framework/PerformanceMonitoring/PerformanceMonitor.cs
+++ /dev/null
@@ -1,184 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Linq;
-using System.Text;
-using StardewModdingAPI.Framework.Events;
-
-namespace StardewModdingAPI.Framework.PerformanceMonitoring
-{
-    /// <summary>Tracks performance metrics.</summary>
-    internal class PerformanceMonitor
-    {
-        /*********
-        ** Fields
-        *********/
-        /// <summary>The recorded alerts.</summary>
-        private readonly IList<AlertEntry> Alerts = new List<AlertEntry>();
-
-        /// <summary>The monitor for output logging.</summary>
-        private readonly IMonitor Monitor;
-
-        /// <summary>The invocation stopwatch.</summary>
-        private readonly Stopwatch InvocationStopwatch = new Stopwatch();
-
-        /// <summary>The underlying performance counter collections.</summary>
-        private readonly IDictionary<string, PerformanceCounterCollection> Collections = new Dictionary<string, PerformanceCounterCollection>(StringComparer.OrdinalIgnoreCase);
-
-
-        /*********
-        ** Accessors
-        *********/
-        /// <summary>Whether alerts are paused.</summary>
-        public bool PauseAlerts { get; set; }
-
-        /// <summary>Whether performance counter tracking is enabled.</summary>
-        public bool EnableTracking { get; set; }
-
-
-        /*********
-        ** Public methods
-        *********/
-        /// <summary>Construct an instance.</summary>
-        /// <param name="monitor">The monitor for output logging.</param>
-        public PerformanceMonitor(IMonitor monitor)
-        {
-            this.Monitor = monitor;
-        }
-
-        /// <summary>Reset all performance counters in all collections.</summary>
-        public void Reset()
-        {
-            foreach (PerformanceCounterCollection collection in this.Collections.Values)
-                collection.Reset();
-        }
-
-        /// <summary>Track the invocation time for a collection.</summary>
-        /// <param name="collectionName">The name of the collection.</param>
-        /// <param name="action">The action to execute and track.</param>
-        public void Track(string collectionName, Action action)
-        {
-            if (!this.EnableTracking)
-            {
-                action();
-                return;
-            }
-
-            PerformanceCounterCollection collection = this.GetOrCreateCollectionByName(collectionName);
-            collection.BeginTrackInvocation();
-            try
-            {
-                action();
-            }
-            finally
-            {
-                collection.EndTrackInvocation();
-            }
-        }
-
-        /// <summary>Track a single performance counter invocation in a specific collection.</summary>
-        /// <param name="collectionName">The name of the collection.</param>
-        /// <param name="sourceName">The name of the source.</param>
-        /// <param name="action">The action to execute and track.</param>
-        public void Track(string collectionName, string sourceName, Action action)
-        {
-            if (!this.EnableTracking)
-            {
-                action();
-                return;
-            }
-
-            PerformanceCounterCollection collection = this.GetOrCreateCollectionByName(collectionName);
-            DateTime eventTime = DateTime.UtcNow;
-            this.InvocationStopwatch.Reset();
-            this.InvocationStopwatch.Start();
-
-            try
-            {
-                action();
-            }
-            finally
-            {
-                this.InvocationStopwatch.Stop();
-                collection.Track(sourceName, new PerformanceCounterEntry(eventTime, this.InvocationStopwatch.Elapsed.TotalMilliseconds));
-            }
-        }
-
-        /// <summary>Reset the performance counters for a specific collection.</summary>
-        /// <param name="name">The collection name.</param>
-        public void ResetCollection(string name)
-        {
-            if (this.Collections.TryGetValue(name, out PerformanceCounterCollection collection))
-            {
-                collection.ResetCallsPerSecond();
-                collection.Reset();
-            }
-        }
-
-        /// <summary>Reset performance counters for a specific source.</summary>
-        /// <param name="name">The name of the source.</param>
-        public void ResetSource(string name)
-        {
-            foreach (PerformanceCounterCollection performanceCounterCollection in this.Collections.Values)
-                performanceCounterCollection.ResetSource(name);
-        }
-
-        /// <summary>Print any queued alerts.</summary>
-        public void PrintQueuedAlerts()
-        {
-            if (this.Alerts.Count == 0)
-                return;
-
-            StringBuilder report = new StringBuilder();
-
-            foreach (AlertEntry alert in this.Alerts)
-            {
-                report.AppendLine($"{alert.Collection.Name} took {alert.ExecutionTimeMilliseconds:F2}ms (exceeded threshold of {alert.ThresholdMilliseconds:F2}ms)");
-
-                foreach (AlertContext context in alert.Context.OrderByDescending(p => p.Elapsed))
-                    report.AppendLine(context.ToString());
-            }
-
-            this.Alerts.Clear();
-            this.Monitor.Log(report.ToString(), LogLevel.Error);
-        }
-
-        /// <summary>Add an alert to the queue.</summary>
-        /// <param name="entry">The alert to add.</param>
-        public void AddAlert(AlertEntry entry)
-        {
-            if (!this.PauseAlerts)
-                this.Alerts.Add(entry);
-        }
-
-        /// <summary>Initialize the default performance counter collections.</summary>
-        /// <param name="eventManager">The event manager.</param>
-        public void InitializePerformanceCounterCollections(EventManager eventManager)
-        {
-            foreach (IManagedEvent @event in eventManager.GetAllEvents())
-                this.Collections[@event.EventName] = new PerformanceCounterCollection(this, @event.EventName, @event.IsPerformanceCritical);
-        }
-
-        /// <summary>Get the underlying performance counters.</summary>
-        public IEnumerable<PerformanceCounterCollection> GetCollections()
-        {
-            return this.Collections.Values;
-        }
-
-
-        /*********
-        ** Public methods
-        *********/
-        /// <summary>Get a collection by name and creates it if it doesn't exist.</summary>
-        /// <param name="name">The name of the collection.</param>
-        private PerformanceCounterCollection GetOrCreateCollectionByName(string name)
-        {
-            if (!this.Collections.TryGetValue(name, out PerformanceCounterCollection collection))
-            {
-                collection = new PerformanceCounterCollection(this, name);
-                this.Collections[name] = collection;
-            }
-            return collection;
-        }
-    }
-}
diff --git a/src/SMAPI/Framework/SCore.cs b/src/SMAPI/Framework/SCore.cs
index 5dc33828..f9113194 100644
--- a/src/SMAPI/Framework/SCore.cs
+++ b/src/SMAPI/Framework/SCore.cs
@@ -28,7 +28,6 @@ using StardewModdingAPI.Framework.ModHelpers;
 using StardewModdingAPI.Framework.ModLoading;
 using StardewModdingAPI.Framework.Networking;
 using StardewModdingAPI.Framework.Patching;
-using StardewModdingAPI.Framework.PerformanceMonitoring;
 using StardewModdingAPI.Framework.Reflection;
 using StardewModdingAPI.Framework.Rendering;
 using StardewModdingAPI.Framework.Serialization;
@@ -143,10 +142,6 @@ namespace StardewModdingAPI.Framework
         /// <remarks>This is initialized after the game starts. This is accessed directly because it's not part of the normal class model.</remarks>
         internal static DeprecationManager DeprecationManager { get; private set; }
 
-        /// <summary>Manages performance counters.</summary>
-        /// <remarks>This is initialized after the game starts. This is non-private for use by Console Commands.</remarks>
-        internal static PerformanceMonitor PerformanceMonitor { get; private set; }
-
         /// <summary>The number of update ticks which have already executed. This is similar to <see cref="Game1.ticks"/>, but incremented more consistently for every tick.</summary>
         internal static uint TicksElapsed { get; private set; }
 
@@ -175,9 +170,7 @@ namespace StardewModdingAPI.Framework
 
             this.LogManager = new LogManager(logPath: logPath, colorConfig: this.Settings.ConsoleColors, writeToConsole: writeToConsole, isVerbose: this.Settings.VerboseLogging, isDeveloperMode: this.Settings.DeveloperMode, getScreenIdForLog: this.GetScreenIdForLog);
 
-            SCore.PerformanceMonitor = new PerformanceMonitor(this.Monitor);
-            this.EventManager = new EventManager(this.ModRegistry, SCore.PerformanceMonitor);
-            SCore.PerformanceMonitor.InitializePerformanceCounterCollections(this.EventManager);
+            this.EventManager = new EventManager(this.ModRegistry);
 
             SCore.DeprecationManager = new DeprecationManager(this.Monitor, this.ModRegistry);
 
@@ -443,7 +436,6 @@ namespace StardewModdingAPI.Framework
                 *********/
                 // print warnings/alerts
                 SCore.DeprecationManager.PrintQueued();
-                SCore.PerformanceMonitor.PrintQueuedAlerts();
 
                 /*********
                 ** First-tick initialization
diff --git a/src/SMAPI/Properties/AssemblyInfo.cs b/src/SMAPI/Properties/AssemblyInfo.cs
index f8f7f4ea..ee8a1674 100644
--- a/src/SMAPI/Properties/AssemblyInfo.cs
+++ b/src/SMAPI/Properties/AssemblyInfo.cs
@@ -1,5 +1,4 @@
 using System.Runtime.CompilerServices;
 
 [assembly: InternalsVisibleTo("SMAPI.Tests")]
-[assembly: InternalsVisibleTo("ConsoleCommands")] // for performance monitoring commands
 [assembly: InternalsVisibleTo("DynamicProxyGenAssembly2")] // Moq for unit testing