RandomSizeByteBufAllocationBenchmark.java — netty Source File

Source Code

/*
 * Copyright 2025 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.microbench.buffer;

import io.netty.buffer.AdaptiveByteBufAllocator;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.buffer.PooledByteBufAllocator;
import io.netty.microbench.util.AbstractMicrobenchmark;
import io.netty.util.ResourceLeakDetector;
import io.netty.util.concurrent.FastThreadLocalThread;
import io.netty.util.internal.MathUtil;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import org.openjdk.jmh.infra.Blackhole;

import java.util.SplittableRandom;
import java.util.concurrent.TimeUnit;

@State(Scope.Thread)
@Warmup(iterations = 10, time = 1)
@Measurement(iterations = 10, time = 1)
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
public class RandomSizeByteBufAllocationBenchmark extends AbstractMicrobenchmark {

    private static final int SEED = 42;
    // see adaptive allocator size classes
    private static final int[] SIZE_CLASSES = {
            32,
            64,
            128,
            256,
            512,
            640, // 512 + 128
            1024,
            1152, // 1024 + 128
            2048,
            2304, // 2048 + 256
// ... (77 more lines)