org.apache.batik.test.PerformanceTest Maven / Gradle / Ivy
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this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
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http://www.apache.org/licenses/LICENSE-2.0
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See the License for the specific language governing permissions and
limitations under the License.
*/
package org.apache.batik.test;
import java.util.Vector;
/**
* This abstract Test implementation instruments performance
* testing.
*
* Derived classes need only implement the runOp and,
* optionally, the runRef methods.
*
* The setReferenceScore method is used to specify
* the last recorded score for the performance test and the
* setAllowedScoreDeviation method is used to specify
* the allowed deviation from the reference score.
*
* @author Vincent Hardy
* @version $Id: PerformanceTest.java 1904389 2022-10-04 09:24:20Z ssteiner $
*/
public abstract class PerformanceTest extends AbstractTest {
/**
* Reference score. -1 means there is no reference score
*/
protected double referenceScore = -1;
/**
* Allowed deviation from the reference score. 15% by default
*/
protected double allowedScoreDeviation = 0.15;
/**
* Score during last run
*/
protected double lastScore = -1;
public double getLastScore() {
return lastScore;
}
public double getReferenceScore() {
return referenceScore;
}
public void setReferenceScore(double referenceScore) {
this.referenceScore = referenceScore;
}
public double getAllowedScoreDeviation() {
return allowedScoreDeviation;
}
public void setAllowedScoreDeviation(double allowedScoreDeviation) {
this.allowedScoreDeviation = allowedScoreDeviation;
}
/**
* Force implementations to only implement runOp
* and other performance specific methods.
*/
public final TestReport run() {
return super.run();
}
/**
* Force implementations to only implement runOp
* and other performance specific methods.
*/
public final boolean runImplBasic() throws Exception {
// Should never be called for a PerformanceTest
return false;
}
/**
* This implementation of runImpl runs the reference
* operation (with runRef), then runs
* the operation (with runOp) and checks whether
* or not the score is within the allowed deviation of the
* reference score.
*
* @see #runRef
* @see #runOp
*/
public final TestReport runImpl() throws Exception {
int iter = 50;
double refUnit = 0;
long refStart = 0;
long refEnd = 0;
long opEnd = 0;
long opStart = 0;
double opLength = 0;
// Run once to remove class load time from timing.
runRef();
runOp();
// System.gc();
double[] scores = new double[iter];
for (int i=0; i>>>>>>> scores[" + i + "] = " + scores[i] + " (" + refUnit + " / " + opLength + ")");
System.gc();
}
System.err.println();
// Now, sort the scores
sort(scores);
// Compute the mean score based on the scores, not accounting
// for the lowest and highest scores
double score = 0;
int trim = 5;
for (int i=trim; i scoreMax) {
TestReport report = reportError("performance.regression");
report.addDescriptionEntry("reference.score", "" + referenceScore);
report.addDescriptionEntry("computed.score", "" + score);
report.addDescriptionEntry("score.deviation", "" + 100*((score-referenceScore)/referenceScore));
return report;
} else if (score < scoreMin) {
TestReport report = reportError("unexpected.performance.improvement");
report.addDescriptionEntry("reference.score", "" + referenceScore);
report.addDescriptionEntry("computed.score", "" + score);
report.addDescriptionEntry("score.deviation", "" + 100*((score-referenceScore)/referenceScore));
return report;
} else {
return reportSuccess();
}
}
}
protected void sort(double[] a) throws Exception {
for (int i = a.length - 1; i>=0; i--) {
boolean swapped = false;
for (int j = 0; j a[j+1]) {
double d = a[j];
a[j] = a[j+1];
a[j+1] = d;
swapped = true;
}
}
if (!swapped)
return;
}
}
/**
* Runs the reference operation.
* By default, this runs the same BufferedImage drawing
* operation 10000 times
*/
protected void runRef() {
Vector v = new Vector();
for (int i=0; i<10000; i++) {
v.addElement("" + i);
}
for (int i=0; i<10000; i++) {
if (v.contains("" + i)) {
v.remove("" + i);
}
}
}
/**
* Runs the tested operation
*/
protected abstract void runOp() throws Exception;
}