io.netty.buffer.ByteBufUtilDecodeStringBenchmark Maven / Gradle / Ivy
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/*
* 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 io.netty.microbench.util.AbstractMicrobenchmark;
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 java.nio.charset.Charset;
import java.util.Arrays;
import java.util.concurrent.TimeUnit;
@Warmup(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 10, time = 1, timeUnit = TimeUnit.SECONDS)
public class ByteBufUtilDecodeStringBenchmark extends AbstractMicrobenchmark {
public enum ByteBufType {
DIRECT {
@Override
ByteBuf newBuffer(byte[] bytes, int length) {
ByteBuf buffer = Unpooled.directBuffer(length);
buffer.writeBytes(bytes, 0, length);
return buffer;
}
},
HEAP_OFFSET {
@Override
ByteBuf newBuffer(byte[] bytes, int length) {
return Unpooled.wrappedBuffer(bytes, 1, length);
}
},
HEAP {
@Override
ByteBuf newBuffer(byte[] bytes, int length) {
return Unpooled.wrappedBuffer(bytes, 0, length);
}
},
COMPOSITE {
@Override
ByteBuf newBuffer(byte[] bytes, int length) {
CompositeByteBuf buffer = Unpooled.compositeBuffer();
int offset = 0;
// 8 buffers per composite.
int capacity = length / 8;
while (length > 0) {
buffer.addComponent(true, Unpooled.wrappedBuffer(bytes, offset, Math.min(length, capacity)));
length -= capacity;
offset += capacity;
}
return buffer;
}
};
abstract ByteBuf newBuffer(byte[] bytes, int length);
}
@Param({ "8", "64", "1024", "10240", "1073741824" })
public int size;
@Param({ "US-ASCII", "UTF-8" })
public String charsetName;
@Param
public ByteBufType bufferType;
private ByteBuf buffer;
private Charset charset;
@Override
protected String[] jvmArgs() {
// Ensure we minimize the GC overhead by sizing the heap big enough.
return new String[] { "-XX:MaxDirectMemorySize=2g", "-Xmx8g", "-Xms8g", "-Xmn6g" };
}
@Setup
public void setup() {
byte[] bytes = new byte[size + 2];
Arrays.fill(bytes, (byte) 'a');
// Use an offset to not allow any optimizations because we use the exact passed in byte[] for heap buffers.
buffer = bufferType.newBuffer(bytes, size);
charset = Charset.forName(charsetName);
}
@TearDown
public void teardown() {
buffer.release();
}
@Benchmark
public String decodeString() {
return ByteBufUtil.decodeString(buffer, buffer.readerIndex(), size, charset);
}
}