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Tests the difference in performance between CharUtils and CharSet. 

git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/lang/trunk@137829 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Gary D. Gregory 2004-03-18 22:37:39 +00:00
parent 1047e3cdf6
commit 1463a4e60d
1 changed files with 164 additions and 0 deletions
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src/test/org/apache/commons/lang/CharUtilsPerfTest.java Normal file
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/*
* 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.");
}
}