/testability-explorer/src/test/java/com/google/test/metric/PerformanceTest.java
Java | 77 lines | 52 code | 10 blank | 15 comment | 0 complexity | 38ab57b76aecdb9856c27331c4a530a8 MD5 | raw file
Possible License(s): Apache-2.0
- /*
- * Copyright 2008 Google Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy of
- * the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations under
- * the License.
- */
- package com.google.test.metric;
- import java.io.File;
- import java.io.FileNotFoundException;
- import java.io.PrintStream;
- import java.util.Properties;
- public class PerformanceTest {
- public static void main(String[] args) throws Exception {
- new PerformanceTest().testStringAnalysisPerformance();
- }
- Runtime runtime = Runtime.getRuntime();
- JavaClassRepository repo = new JavaClassRepository();
- MetricComputer computer = new MetricComputer(repo, null,
- new RegExpWhiteList(), 1);
- File reportDir = new File("target/reports/perf");
- public void testStringAnalysisPerformance() throws Exception {
- System.gc();
- long startMem = usedMemory();
- long startTime = System.currentTimeMillis();
- ClassCost runPerformance = runPerformance(String.class);
- long endTime = System.currentTimeMillis();
- long endMem = usedMemory();
- System.gc();
- runPerformance.hashCode();
- runPerformance = null;
- System.gc();
- long end2Mem = usedMemory();
- double time = (endTime - startTime) / 1000d;
- double memTotal = (endMem - startMem) / 1024d / 1024d;
- double memCost = (endMem - end2Mem) / 1024d / 1024d;
- System.out.println("Execution time: " + time + " sec");
- System.out.println("Total Memory: " + memTotal + " MB");
- System.out.println("ClassCost Memory: " + memCost + " MB");
- reportDir.mkdirs();
- writeResult(time, "time.prop");
- writeResult(memTotal, "memTotal.prop");
- writeResult(memCost, "memCost.prop");
- }
- private void writeResult(double result, String file)
- throws FileNotFoundException {
- Properties timeProp = new Properties();
- timeProp.setProperty("YVALUE", ""+result);
- PrintStream os = new PrintStream(new File(reportDir, file));
- timeProp.list(os);
- os.close();
- }
- private long usedMemory() {
- return runtime.totalMemory() - runtime.freeMemory();
- }
- private ClassCost runPerformance(Class<String> clazz) {
- return computer.compute(clazz.getName());
- }
- }