ggregory 2004/03/18 14:37:39 Added: lang/src/test/org/apache/commons/lang CharUtilsPerfTest.java Log: Tests the difference in performance between CharUtils and CharSet. Revision Changes Path 1.1 jakarta-commons/lang/src/test/org/apache/commons/lang/CharUtilsPerfTest.java Index: CharUtilsPerfTest.java =================================================================== /* * Copyright 2004 The Apache Software Foundation. * * 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 org.apache.commons.lang; import java.text.NumberFormat; import java.util.Calendar; /** * Tests the difference in performance between CharUtils and CharSet. * * Sample runs: Now: Thu Mar 18 14:29:48 PST 2004 Sun Microsystems Inc. Java(TM) 2 Runtime Environment, Standard Edition 1.3.1_10-b03 Sun Microsystems Inc. Java HotSpot(TM) Client VM 1.3.1_10-b03 Windows XP 5.1 x86 pentium i486 i386 Do nohting: 0 milliseconds. run_CharUtils_isAsciiNumeric: 4,545 milliseconds. run_inlined_CharUtils_isAsciiNumeric: 3,417 milliseconds. run_inlined_CharUtils_isAsciiNumeric: 85,679 milliseconds. Now: Thu Mar 18 14:24:51 PST 2004 Sun Microsystems Inc. Java(TM) 2 Runtime Environment, Standard Edition 1.4.2_04-b05 Sun Microsystems Inc. Java HotSpot(TM) Client VM 1.4.2_04-b05 Windows XP 5.1 x86 pentium i486 i386 Do nohting: 0 milliseconds. run_CharUtils_isAsciiNumeric: 2,578 milliseconds. run_inlined_CharUtils_isAsciiNumeric: 2,477 milliseconds. run_inlined_CharUtils_isAsciiNumeric: 114,429 milliseconds. Now: Thu Mar 18 14:27:55 PST 2004 Sun Microsystems Inc. Java(TM) 2 Runtime Environment, Standard Edition 1.4.2_04-b05 Sun Microsystems Inc. Java HotSpot(TM) Server VM 1.4.2_04-b05 Windows XP 5.1 x86 pentium i486 i386 Do nohting: 0 milliseconds. run_CharUtils_isAsciiNumeric: 630 milliseconds. run_inlined_CharUtils_isAsciiNumeric: 709 milliseconds. run_inlined_CharUtils_isAsciiNumeric: 84,420 milliseconds. * @version $Id: CharUtilsPerfTest.java,v 1.1 2004/03/18 22:37:39 ggregory Exp $ */ public class CharUtilsPerfTest { final static String VERSION = "$Id: CharUtilsPerfTest.java,v 1.1 2004/03/18 22:37:39 ggregory Exp $"; final static int WARM_UP = 100; final static int COUNT = 5000; final static char[] CHAR_SAMPLES; static { CHAR_SAMPLES = new char[Character.MAX_VALUE]; for (char i = Character.MIN_VALUE; i < Character.MAX_VALUE; i++) { CHAR_SAMPLES[i] = i; } } public static void main(String[] args) { new CharUtilsPerfTest().run(); } private void printSysInfo() { System.out.println(VERSION); System.out.println("Now: " + Calendar.getInstance().getTime()); System.out.println(System.getProperty("java.vendor") + " " + System.getProperty("java.runtime.name") + " " + System.getProperty("java.runtime.version")); System.out.println(System.getProperty("java.vm.vendor") + " " + System.getProperty("java.vm.name") + " " + System.getProperty("java.vm.version")); System.out.println(System.getProperty("os.name") + " " + System.getProperty("os.version") + " " + System.getProperty("os.arch") + " " + System.getProperty("sun.cpu.isalist")); } private void run() { this.printSysInfo(); long start; start = System.currentTimeMillis(); this.printlnTotal("Do nohting", start); //System.out.println("Warming up..."); run_CharUtils_isAsciiNumeric(WARM_UP); //System.out.println("Measuring..."); start = System.currentTimeMillis(); run_CharUtils_isAsciiNumeric(COUNT); this.printlnTotal("run_CharUtils_isAsciiNumeric", start); //System.out.println("Warming up..."); run_inlined_CharUtils_isAsciiNumeric(WARM_UP); //System.out.println("Measuring..."); start = System.currentTimeMillis(); run_inlined_CharUtils_isAsciiNumeric(COUNT); this.printlnTotal("run_inlined_CharUtils_isAsciiNumeric", start); //System.out.println("Warming up..."); run_CharSet(WARM_UP); //System.out.println("Measuring..."); start = System.currentTimeMillis(); run_CharSet(COUNT); this.printlnTotal("run_inlined_CharUtils_isAsciiNumeric", start); } private int run_CharSet(int loopCount) { int t = 0; for (int i = 0; i < loopCount; i++) { for (int j = 0; j < CHAR_SAMPLES.length; j++) { char ch = CHAR_SAMPLES[j]; boolean b = CharSet.ASCII_NUMERIC.contains(ch); t += b ? 1 : 0; } } return t; } private int run_CharUtils_isAsciiNumeric(int loopCount) { int t = 0; for (int i = 0; i < loopCount; i++) { for (int j = 0; j < CHAR_SAMPLES.length; j++) { char ch = CHAR_SAMPLES[j]; boolean b = CharUtils.isAsciiNumeric(ch); t += b ? 1 : 0; } } return t; } private int run_inlined_CharUtils_isAsciiNumeric(int loopCount) { int t = 0; for (int i = 0; i < loopCount; i++) { for (int j = 0; j < CHAR_SAMPLES.length; j++) { char ch = CHAR_SAMPLES[j]; boolean b = (ch >= '0' && ch <= '9'); t += b ? 1 : 0; } } return t; } private void printlnTotal(String prefix, long start) { long total = System.currentTimeMillis() - start; System.out.println(prefix + ": " + NumberFormat.getInstance().format(total) + " milliseconds."); } }
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