org.mentaqueue.util.Benchmarker Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of menta-queue Show documentation
Show all versions of menta-queue Show documentation
A super fast inter-thread transfer queue.
The newest version!
package org.mentaqueue.util;
public class Benchmarker {
private final static Benchmarker instance = new Benchmarker();
private static final int DEFAULT_WARMUP = 0;
private long time;
private long count = 0;
private long totalTime = 0;
private long minTime = Long.MAX_VALUE;
private long maxTime = Long.MIN_VALUE;
private final int warmup;
public Benchmarker(final int warmup) {
this.warmup = warmup;
try {
// initialize it here so when you measure for the first time gargage is not created...
Class.forName("java.lang.Math");
}
catch (final Exception e) {
e.printStackTrace();
}
}
public Benchmarker() {
this(DEFAULT_WARMUP);
}
public final static Benchmarker instance() {
return instance;
}
public void reset() {
time = 0;
count = 0;
totalTime = 0;
minTime = Long.MAX_VALUE;
maxTime = Long.MIN_VALUE;
}
public void mark() {
time = System.nanoTime();
}
public long measure() {
if (time > 0) {
final long lastTime = System.nanoTime() - time;
final boolean counted = measure(lastTime);
if (counted) {
return lastTime;
}
}
return -1;
}
public boolean measure(final long lastTime) {
if (++count > warmup) {
totalTime += lastTime;
minTime = Math.min(minTime, lastTime);
maxTime = Math.max(maxTime, lastTime);
return true;
}
return false;
}
private final double avg() {
final long realCount = count - warmup;
if (realCount <= 0) {
return 0;
}
final double avg = ((double) totalTime / (double) realCount);
final double rounded = Math.round(avg * 100D) / 100D;
return rounded;
}
public String results() {
final StringBuilder sb = new StringBuilder(128);
final long realCount = count - warmup;
sb.append("Iterations: ").append(realCount);
sb.append(" | Avg Time: ").append(String.valueOf(avg())).append(" nanos");
if (realCount > 0) {
sb.append(" | Min Time: ").append(minTime);
sb.append(" nanos | Max Time: ").append(maxTime);
sb.append(" nanos");
}
return sb.toString();
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy