95 lines
3.0 KiB
Java
95 lines
3.0 KiB
Java
/*
|
|
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
package org.openjdk.bench.java.lang;
|
|
|
|
import org.openjdk.jmh.annotations.Benchmark;
|
|
import org.openjdk.jmh.annotations.BenchmarkMode;
|
|
import org.openjdk.jmh.annotations.Fork;
|
|
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 java.util.concurrent.TimeUnit;
|
|
|
|
/**
|
|
* Benchmark measuring Unaligned System.arraycopy.
|
|
*/
|
|
@BenchmarkMode(Mode.AverageTime)
|
|
@OutputTimeUnit(TimeUnit.NANOSECONDS)
|
|
@State(Scope.Thread)
|
|
@Warmup(iterations = 10, time = 1)
|
|
@Measurement(iterations = 5, time = 1)
|
|
@Fork(value = 3)
|
|
public class ArrayCopyUnalignedDst {
|
|
|
|
@Param({"1", "10", "150", "1200"})
|
|
int length;
|
|
|
|
int fromPos, toPos;
|
|
byte[] fromByteArr, toByteArr;
|
|
char[] fromCharArr, toCharArr;
|
|
int[] fromIntArr, toIntArr;
|
|
long[] fromLongArr, toLongArr;
|
|
|
|
@Setup
|
|
public void setup() {
|
|
// Dst position Unaligned
|
|
fromPos = 8;
|
|
toPos = 9;
|
|
|
|
fromByteArr = new byte[1210];
|
|
toByteArr = new byte[1210];
|
|
fromCharArr = new char[1210];
|
|
toCharArr = new char[1210];
|
|
fromIntArr = new int[1210];
|
|
toIntArr = new int[1210];
|
|
fromLongArr = new long[1210];
|
|
toLongArr = new long[1210];
|
|
}
|
|
|
|
@Benchmark
|
|
public void testByte() {
|
|
System.arraycopy(fromByteArr, fromPos, toByteArr, toPos, length);
|
|
}
|
|
|
|
@Benchmark
|
|
public void testChar() {
|
|
System.arraycopy(fromCharArr, fromPos, toCharArr, toPos, length);
|
|
}
|
|
|
|
@Benchmark
|
|
public void testInt() {
|
|
System.arraycopy(fromIntArr, fromPos, toIntArr, toPos, length);
|
|
}
|
|
|
|
@Benchmark
|
|
public void testLong() {
|
|
System.arraycopy(fromLongArr, fromPos, toLongArr, toPos, length);
|
|
}
|
|
}
|