| /******************************************************************************* |
| * Copyright (c) 2005, 2007 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.debug.tests.performance; |
| |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| import org.eclipse.test.performance.Dimension; |
| import org.eclipse.test.performance.Performance; |
| import org.eclipse.test.performance.PerformanceTestCase; |
| |
| /** |
| * Tests the performance of pattern matching on a specific line of text |
| */ |
| public class PerfDebugBaselineTest extends PerformanceTestCase { |
| |
| /** |
| * Test the performance of matching a specific pattern on the given line of text |
| */ |
| public void testBaseline() { |
| tagAsSummary("Baseline Test", Dimension.ELAPSED_PROCESS); |
| Performance perf = Performance.getDefault(); |
| StringBuffer buffer = new StringBuffer(); |
| for (int i = 0; i < 10000; i++) { |
| buffer.append("at org.eclipse.jdt.internal.debug.core.model.JDILocalVariable.retrieveValue(JDILocalVariable.java:56\n"); |
| } |
| String text = buffer.toString(); |
| |
| //ensure class loading and JIT is done. |
| for (int i= 0; i < 5; i++) { |
| findMatches(text); |
| } |
| |
| try { |
| for (int i= 0; i < 10; i++) { |
| fPerformanceMeter.start(); |
| findMatches(text); |
| fPerformanceMeter.stop(); |
| } |
| fPerformanceMeter.commit(); |
| perf.assertPerformance(fPerformanceMeter); |
| } finally { |
| fPerformanceMeter.dispose(); |
| } |
| } |
| |
| /* |
| * Pattern does not match the input - input is missing paren before newline. |
| * Strangely, the matching completes much quicker when there are 1000 matches |
| * than when there are none. |
| */ |
| private int findMatches(String text) { |
| Pattern pattern = Pattern.compile("\\w\\S*\\(\\S*\\.java:\\S*\\)"); |
| Matcher matcher = pattern.matcher(text); |
| |
| int count = 0; |
| while (matcher.find()) { |
| count++; |
| } |
| return count; |
| } |
| } |