64 lines
1.5 KiB
Java
64 lines
1.5 KiB
Java
/*******************************************************************************
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* Copyright (c) 2002 - 2006 IBM Corporation.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package com.ibm.wala.util.perf;
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/**
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* Basic class to time events
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*/
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public class Stopwatch {
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protected int count;
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/**
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* elapsed time in nanoseconds
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*/
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private long elapsedTime;
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private long startTime;
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public Stopwatch() {
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}
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public void start() {
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startTime = System.nanoTime();
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}
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public void stop() {
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long endTime = System.nanoTime();
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count++;
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elapsedTime += (endTime - startTime);
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}
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/**
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* @return elapsed time in ms
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*/
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public long getElapsedMillis() {
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return elapsedTime / 1000000;
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}
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/**
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* @return number of times this stopwatch was stopped
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*/
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public int getCount() {
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return count;
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}
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@Override
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public String toString() {
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StringBuffer sb = new StringBuffer();
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sb.append("total: " + getElapsedMillis());
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if (count > 0){
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sb.append(", inv: " + count);
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sb.append(", avg: " + getElapsedMillis()/count);
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}
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return sb.toString();
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}
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} |