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/*
* Copyright (C) 2008 The Guava Authors
*
* 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 com.google.common.base;
import com.google.caliper.Runner;
import com.google.caliper.SimpleBenchmark;
import com.google.common.base.Stopwatch;
import java.util.concurrent.TimeUnit;
/**
* Simple benchmark: create, start, read. This does not currently report the
* most useful result because it's ambiguous to what extent the stopwatch
* benchmark is being affected by GC.
*
* @author Kevin Bourrillion
*/
public class StopwatchBenchmark extends SimpleBenchmark {
public long timeStopwatch(int reps) {
long total = 0;
for (int i = 0; i < reps; i++) {
Stopwatch s = new Stopwatch().start();
// here is where you would do something
total += s.elapsed(TimeUnit.NANOSECONDS);
}
return total;
}
public long timeManual(int reps) {
long total = 0;
for (int i = 0; i < reps; i++) {
long start = System.nanoTime();
// here is where you would do something
total += (System.nanoTime() - start);
}
return total;
}
public static void main(String[] args) {
Runner.main(StopwatchBenchmark.class, args);
}
}
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