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Java example source code file (HeapByteBufBenchmark.java)

This example Java source code file (HeapByteBufBenchmark.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

abstractmicrobenchmark, benchmark, bytebuf, class, constructor, exception, heapbytebufbenchmark, reflection, setup, teardown

The HeapByteBufBenchmark.java Java example source code

/*
 * Copyright 2015 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:
 *
 *   http://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.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.microbench.util.AbstractMicrobenchmark;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.TearDown;

import java.lang.reflect.Constructor;

public class HeapByteBufBenchmark extends AbstractMicrobenchmark {

    private ByteBuf unsafeBuffer;
    private ByteBuf buffer;

    private static ByteBuf newBuffer(String classname) throws Exception {
        // Using reflection to workound package-private implementations.
        Class<?> clazz = Class.forName(classname);
        Constructor<?> constructor = clazz.getDeclaredConstructor(ByteBufAllocator.class, int.class, int.class);
        constructor.setAccessible(true);
        return (ByteBuf) constructor.newInstance(ByteBufAllocator.DEFAULT, 8, Integer.MAX_VALUE);
    }

    @Setup
    public void setup() throws Exception {
        unsafeBuffer = newBuffer("io.netty.buffer.UnpooledUnsafeHeapByteBuf");
        buffer = newBuffer("io.netty.buffer.UnpooledHeapByteBuf");
        unsafeBuffer.writeLong(1L);
        buffer.writeLong(1L);
    }

    @TearDown
    public void destroy() {
        unsafeBuffer.release();
        buffer.release();
    }

    @Benchmark
    public byte getByteUnsafe() {
        return unsafeBuffer.getByte(0);
    }

    @Benchmark
    public short getByte() {
        return buffer.getByte(0);
    }

    @Benchmark
    public short getShortUnsafe() {
        return unsafeBuffer.getShort(0);
    }

    @Benchmark
    public short getShort() {
        return buffer.getShort(0);
    }

    @Benchmark
    public int getMediumUnsafe() {
        return unsafeBuffer.getMedium(0);
    }

    @Benchmark
    public int getMedium() {
        return buffer.getMedium(0);
    }

    @Benchmark
    public int getIntUnsafe() {
        return unsafeBuffer.getInt(0);
    }

    @Benchmark
    public int getInt() {
        return buffer.getInt(0);
    }

    @Benchmark
    public long getLongUnsafe() {
        return unsafeBuffer.getLong(0);
    }

    @Benchmark
    public long getLong() {
        return buffer.getLong(0);
    }
}

Other Java examples (source code examples)

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