Attachment 150740 Details for Bug 245008 – Benchmark of string shortening

Benchmark of string shortening

BenchMisc.java (text/x-java), 2.10 KB, created by John Arthorne

on 2009-10-28 11:41:36 EDT

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Creator: John Arthorne

Created: 2009-10-28 11:41:36 EDT

Size: 2.10 KB

patch

obsolete

>/**********************************************************************
> * Copyright (c) 2009 IBM Corporation and others. All rights reserved.   This
> * program and the accompanying materials are made available under the terms of
> * the Common Public License v1.0 which accompanies this distribution, and is
> * available at http://www.eclipse.org/legal/cpl-v10.html
> * 
> * Contributors: 
> * IBM - Initial API and implementation
> **********************************************************************/
>package org.johna.perf;
>
>import java.lang.reflect.Field;
>
>public final class BenchMisc {
>	private static final int LOOPS = 1000000;
>
>	public static final void main(final String[] args) {
>		try {
>			new BenchMisc().bench();
>		} catch (Exception e) {
>			e.printStackTrace();
>		}
>	}
>
>	private static String stringSnip1(String string) {
>		return new String(string);
>	}
>
>	private static String stringSnip2(String name) throws Exception {
>		Class c = String.class;
>		Field fldValue = c.getDeclaredField("value"); //$NON-NLS-1$ 
>		fldValue.setAccessible(true);
>		Object o = fldValue.get(name);
>		if (o != null) {
>			char[] value = (char[]) o;
>			if (value.length != name.length()) {
>				name = new String(name);
>			}
>		}
>		return name;
>	}
>
>	public void bench() throws Exception{
>		String[] inputs = new String[] {"string1", "anotherstring", "yetanotherstring", "onemore string"};
>//		String[] inputs = new String[] {"string1".substring(3), "anotherstring".substring(1), "yetanotherstring".substring(4), "onemore string".substring(1)};
>		System.out.print("simple: ");
>		int loop = 0;
>		long startTime = System.currentTimeMillis();
>		while (loop++ < LOOPS) {
>			for (int i = 0; i < inputs.length; i++) {
>				stringSnip1(inputs[i]);
>			}
>		}
>		System.out.println((System.currentTimeMillis() - startTime) + "ms");
>
>		System.out.print("reflection: ");
>		loop = 0;
>		startTime = System.currentTimeMillis();
>		while (loop++ < LOOPS) {
>			for (int i = 0; i < inputs.length; i++) {
>				stringSnip2(inputs[i]);
>			}
>		}
>		System.out.println((System.currentTimeMillis() - startTime) + "ms");
>	}
>
>}

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Attachments on bug 245008: 110723 | 110817 | 148334 | 148627 | 148779 | 150740 | 175560 | 175565 | 175704 | 175730 | 175795 | 175798