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boofcv.misc.ProfileOperation Maven / Gradle / Ivy

/*
 * Copyright (c) 2020, Peter Abeles. All Rights Reserved.
 *
 * This file is part of BoofCV (http://boofcv.org).
 *
 * 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 boofcv.misc;

/**
 * @author Peter Abeles
 */
public class ProfileOperation {

	/**
	 * See how long it takes to run the process 'num' times and print the results
	 * to standard out
	 */
	public static void profile( Performer performer, int num ) {

		long deltaTime = measureTime(performer, num);

		System.out.printf("%30s time = %8d ms per frame = %8.3f\n",
				performer.getName(), deltaTime, (deltaTime/(double)num));
//        System.out.println(performer.getClass().getSimpleName()+
//                " time = "+deltaTime+"  ms per frame "+(deltaTime/(double)num));
	}

	public static void printOpsPerSec( Performer performer, long minTestTime ) {
		try {
			double opsPerSecond = profileOpsPerSec(performer, minTestTime, false);

			String name = performer.getName() == null ? performer.getClass().getSimpleName() : performer.getName();
			System.out.printf("%30s  ops/sec = %7.3f\n", name, opsPerSecond);
		} catch (RuntimeException e) {
			e.printStackTrace();
			System.out.printf("%30s  FAILED\n", performer.getClass().getSimpleName());
		}
	}

	public static double profileOpsPerSec( Performer performer, long minTestTime, boolean warmUp ) {
		if (warmUp)
			performer.process();

		int N = 1;
		long elapsedTime;
		while (true) {
			elapsedTime = measureTime(performer, N);
			if (elapsedTime >= minTestTime)
				break;
			N = N*2;
		}

		return (double)N/(elapsedTime/1000.0);
	}

	public static long measureTime( Performer performer, int num ) {
		long startTime = System.nanoTime();
		for (int i = 0; i < num; i++) {
			performer.process();
		}
		long stopTime = System.nanoTime();

		return (stopTime - startTime)/1000000L;
	}
}




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