CompositeByteBufWriteOutBenchmark.java — netty Source File

Source Code

/*
 * Copyright 2018 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.buffer;

import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.TearDown;
import org.openjdk.jmh.annotations.Warmup;

import io.netty.microbench.util.AbstractMicrobenchmark;

import static io.netty.buffer.Unpooled.wrappedBuffer;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;

@Warmup(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 12, time = 1, timeUnit = TimeUnit.SECONDS)
public class CompositeByteBufWriteOutBenchmark extends AbstractMicrobenchmark {

    public enum ByteBufType {
        SMALL_CHUNKS {
            @Override
            ByteBuf[] sourceBuffers(int length) {
                return makeSmallChunks(length);
            }
        },
        LARGE_CHUNKS {
            @Override
            ByteBuf[] sourceBuffers(int length) {
                return makeLargeChunks(length);
            }
        };
        abstract ByteBuf[] sourceBuffers(int length);
    }

    @Override
    protected String[] jvmArgs() {
        // Ensure we minimize the GC overhead by sizing the heap big enough.
        return new String[] { "-XX:MaxDirectMemorySize=2g", "-Xmx4g", "-Xms4g", "-Xmn3g" };
    }

    @Param({
            "64",
// ... (61 more lines)