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From ggreg...@apache.org
Subject cvs commit: jakarta-commons/lang/src/test/org/apache/commons/lang CharUtilsPerfTest.java
Date Thu, 18 Mar 2004 22:37:39 GMT
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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