org.javasimon.examples.ManagerVsStopwatchComparison Maven / Gradle / Ivy
The newest version!
package org.javasimon.examples;
import org.javasimon.SimonManager;
import org.javasimon.Stopwatch;
import org.javasimon.StopwatchSample;
import org.javasimon.utils.BenchmarkUtils;
import org.javasimon.utils.GoogleChartImageGenerator;
import org.javasimon.utils.SimonUtils;
/**
* Compares time to obtain the Simon from the Manager with start/stop method calls.
* It also measures loop containing get+start/stop construction, so you can get the idea of how fast
* it is. Generally - it's not necessary to hold the Simon in a class field but if you measure something
* critical, you can do that and get some time. All the measuring follows after inserting 100000 stopwatches
* into the SM's internal HashMap (sorted map was much slower). Last run is done with SM after reset
* (nearly empty HashMap).
*
* @author Richard "Virgo" Richter
*/
public final class ManagerVsStopwatchComparison {
private static final int LOOP = 10000000;
private static final String NAME = SimonUtils.generateNameForClass("-stopwatch");
private ManagerVsStopwatchComparison() {
}
/**
* Entry point of the demo application.
*
* @param args command line arguments
*/
public static void main(String[] args) {
ExampleUtils.fillManagerWithSimons(100000);
StopwatchSample[] results = BenchmarkUtils.run(2, 5,
new BenchmarkUtils.Task("getStopwatch") {
@Override
public void perform() throws Exception {
for (int i = 0; i < LOOP; i++) {
SimonManager.getStopwatch(NAME);
}
}
},
new BenchmarkUtils.Task("start-stop") {
@Override
public void perform() throws Exception {
Stopwatch stopwatch = SimonManager.getStopwatch(NAME).reset();
for (int i = 0; i < LOOP; i++) {
stopwatch.start().stop();
}
}
},
new BenchmarkUtils.Task("get-start-stop") {
@Override
public void perform() throws Exception {
SimonManager.getStopwatch(NAME).reset();
for (int i = 0; i < LOOP; i++) {
SimonManager.getStopwatch(NAME).start().stop();
}
}
},
new BenchmarkUtils.Task("clear-get-start-stop") {
@Override
public void perform() throws Exception {
SimonManager.clear(); // has to be recreated (only once though) + all other 100k simons are gone
SimonManager.getStopwatch(NAME).reset();
for (int i = 0; i < LOOP; i++) {
SimonManager.getStopwatch(NAME).start().stop();
}
}
}
);
System.out.println("\nGoogle Chart avg:\n" + GoogleChartImageGenerator.barChart(
results, "10M-loop duration", SimonUtils.NANOS_IN_MILLIS, "ms", false));
}
}