Performance improvements in uuid from item getting

1 files changed, 61 insertions, 0 deletions

diff --git a/src/test/kotlin/nontests/PerformanceTest.kt b/src/test/kotlin/nontests/PerformanceTest.kt
new file mode 100644
index 00000000..14dbc121
--- /dev/null
+++ b/src/test/kotlin/nontests/PerformanceTest.kt
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2023 NotEnoughUpdates contributors
+ *
+ * This file is part of NotEnoughUpdates.
+ *
+ * NotEnoughUpdates is free software: you can redistribute it
+ * and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation, either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * NotEnoughUpdates is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with NotEnoughUpdates. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package nontests
+
+import net.minecraft.nbt.NBTTagCompound
+import kotlin.random.Random
+import kotlin.time.ExperimentalTime
+import kotlin.time.measureTime
+
+
+fun main() {
+    val simple = NBTTagCompound().apply {
+        setTag("ExtraAttributes", NBTTagCompound().apply {
+            setString("uuid", "08248f07-41c1-4353-8e37-5225939cb559")
+        })
+    }
+    val complex = simple.copy() as NBTTagCompound
+    for (i in 0..100) {
+        complex.setInteger("tag$i", Random.nextInt())
+    }
+    testPerf(simple, "Simple")
+    testPerf(complex, "Complex")
+
+}
+
+@OptIn(ExperimentalTime::class)
+fun testPerf(tag: NBTTagCompound, name: String) {
+    val hashCodeTime = measureTime {
+        for (i in 0..100000) {
+            tag.hashCode()
+        }
+    }
+    val accessTime = measureTime {
+        for (i in 0..100000) {
+            tag.getCompoundTag("ExtraAttributes").getString("uuid")
+        }
+    }
+    println("$name - hashCode: $hashCodeTime")
+    println("$name - accesTime: $accessTime")
+}
+
+
+
+