Add BiomeLookupBenchmark

build.gradle.kts

@@ -32,6 +32,9 @@ tasks {
         val compilerArgs = options.compilerArgs
         options.encoding = Charsets.UTF_8.name()
         compilerArgs.add("--add-modules=jdk.incubator.vector") // Gale - Pufferfish - SIMD support
+        compilerArgs.add("-Xlint:-deprecation")
+        compilerArgs.add("-Xlint:-unchecked")
+        compilerArgs.add("-Xlint:-removal")
     }
 
     build.configure {

src/main/java/cn/dreeam/sunbox/SunBox.java

@@ -19,7 +19,7 @@ public static void main(String[] args) {
     private static void runJMH() throws Exception {
         Options opt = new OptionsBuilder()
                 // TODO: Notice: Include benchmark class name you want
-                .include("NonNullListGetBenchmark")
+                .include("BiomeLookupBenchmark")
                 .forks(1)
                 .warmupIterations(4)
                 .measurementIterations(10)

src/main/java/cn/dreeam/sunbox/benchmarks/jmh/BiomeLookupBenchmark.java

@@ -0,0 +1,48 @@
+package cn.dreeam.sunbox.benchmarks.jmh;
+
+import org.openjdk.jmh.annotations.*;
+import java.util.Random;
+import java.util.concurrent.TimeUnit;
+
+/*
+Estimate running time: ~2mins
+Target patch: Carpet-Fixes-Optimized-getBiome-method.patch
+Target PR: https://github.com/Winds-Studio/Leaf/pull/637
+*/
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@State(Scope.Thread)
+public class BiomeLookupBenchmark {
+
+    private static final double[] QUART_OFFSETS = {0.0D, 0.25D, 0.5D, 0.75D};
+
+    private int[] inputData;
+    private static final int SIZE = 4096;
+
+    @Setup
+    public void setup() {
+        inputData = new int[SIZE];
+        Random rand = new Random(12345L);
+        for (int i = 0; i < SIZE; i++) {
+            inputData[i] = rand.nextInt();
+        }
+    }
+
+    @Benchmark
+    public double testFpDivision() {
+        double sum = 0;
+        for (int i = 0; i < SIZE; i++) {
+            sum += (double) (inputData[i] & 3) / 4.0;
+        }
+        return sum;
+    }
+
+    @Benchmark
+    public double testTableLookup() {
+        double sum = 0;
+        for (int i = 0; i < SIZE; i++) {
+            sum += QUART_OFFSETS[inputData[i] & 3];
+        }
+        return sum;
+    }
+}