com.mysema.testutil.Runner.java Source code

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Here is the source code for com.mysema.testutil.Runner.java

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/*
 * Copyright 2012, Mysema Ltd
 * 
 * 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.mysema.testutil;

import com.google.common.base.Stopwatch;

public final class Runner {

    private static final int WARMUP = 50000;
    private static final int BENCHMARK = 1000000;

    public static void run(String label, Benchmark benchmark) throws Exception {
        // warmup
        benchmark.run(WARMUP);
        System.err.print("- ");

        // run garbage collection
        System.gc();
        System.err.print("- ");

        // perform timing
        Stopwatch stopwatch = Stopwatch.createStarted();
        benchmark.run(BENCHMARK);
        System.err.println(label + " " + stopwatch.stop().toString());
    }

    private Runner() {
    }

}