org.javasimon.examples.SimonNameGenerationTest Maven / Gradle / Ivy
package org.javasimon.examples;
import org.javasimon.*;
import org.javasimon.utils.BenchmarkUtils;
import org.javasimon.utils.GoogleChartImageGenerator;
import org.javasimon.utils.SimonUtils;
/**
* Compares get/start/stop with a static name and the same cycle with a name generated every time.
* Typical result (Windows 7, JDK 6u31-32b, Intel Core i5) is:
* http://chart.apis.google.com/chart?chs=420x320&cht=bvg&chbh=a,3,40&chco=2d69f9,a6c9fd,d0eeff&chxt=y,x,x&chtt=200k-loop+duration&chxr=2,0,4000&chds=0,4000&chxl=0:|0|1000|2000|3000|4000|1:|get-start-stop|gen-get-s-s|generate|get-stacktrace|2:|91.84+ms|3308.45+ms|3098.25+ms|2589.97+ms&chd=t:91.84,3308.45,3098.25,2589.97&chdl=avg&.png
*
* Morale: Generate your name once, not every time - most of the overhead is stacktrace construction (Java SE/native code).
*
* @author Richard "Virgo" Richter
*/
public final class SimonNameGenerationTest {
private static final int LOOP = 200000;
private static final String NAME = SimonUtils.generateNameForClass("-stopwatch");
private SimonNameGenerationTest() {
}
/**
* Entry point of the demo application.
*
* @param args command line arguments
*/
public static void main(String[] args) {
StopwatchSample[] results = BenchmarkUtils.run(2, 5,
new BenchmarkUtils.Task("get-start-stop") {
@Override
public void perform() throws Exception {
for (int i = 0; i < LOOP; i++) {
SimonManager.getStopwatch(NAME).start().stop();
}
}
},
new BenchmarkUtils.Task("gen-get-s-s") {
@Override
public void perform() throws Exception {
for (int i = 0; i < LOOP; i++) {
SimonManager.getStopwatch(SimonUtils.generateNameForClass("-stopwatch")).start().stop();
}
}
},
new BenchmarkUtils.Task("generate") {
@Override
public void perform() throws Exception {
for (int i = 0; i < LOOP; i++) {
SimonUtils.generateName();
}
}
},
new BenchmarkUtils.Task("get-stacktrace") {
@Override
public void perform() throws Exception {
for (int i = 0; i < LOOP; i++) {
Thread.currentThread().getStackTrace();
}
}
}
);
System.out.println("\nGoogle Chart avg:\n" + GoogleChartImageGenerator.barChart(
results, "200k-loop duration", SimonUtils.NANOS_IN_MILLIS, "ms", false));
System.out.println("\nGoogle Chart avg/max/min:\n" + GoogleChartImageGenerator.barChart(
results, "200k-loop duration", SimonUtils.NANOS_IN_MILLIS, "ms", true));
}
}