/*
* Copyright 2008-2009 LinkedIn, Inc
*
* Licensed 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 voldemort;
public class TestArrayCopy {
/**
* @param args
*/
public static void main(String[] args) {
int iterations = 1000000000;
int size = 20;
byte[] source = new byte[size];
byte[] dest = new byte[size];
for(int i = 0; i < size; i++)
source[i] = (byte) i;
// test arraycopy
long start = System.nanoTime();
for(int i = 0; i < iterations; i++)
System.arraycopy(source, 0, dest, 0, size);
long elapsed = System.nanoTime() - start;
System.out.println("System.arraycopy(): " + (elapsed / (double) iterations));
// test for loop
start = System.nanoTime();
for(int i = 0; i < iterations; i++)
for(int j = 0; j < size; j++)
dest[j] = source[j];
elapsed = System.nanoTime() - start;
System.out.println("for loop: " + (elapsed / (double) iterations));
}
}