From owner-freebsd-java  Sun Oct 10 19:28:39 1999
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From: Godmar Back <gback@cs.utah.edu>
Message-Id: <199910110228.UAA24017@faith.cs.utah.edu>
Subject: Re: time measurement in Java
To: chris@tourneyland.com
Date: Sun, 10 Oct 1999 20:28:35 -0600 (MDT)
Cc: freebsd-java@FreeBSD.ORG
In-Reply-To: <3.0.6.32.19991007213913.00857ec0@mail.9netave.net> from "chris@tourneyland.com" at Oct 7, 99 09:39:13 pm
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 FWIW,
http://www.cs.utah.edu/~gback/linux-jdk-cyclecounter/
has a class to access the Pentium cycle counter for more precise measurements.
Should run under FreeBSD/Elf too.

	- Godmar

> 
> >System.currentTimeMillis() returns time in milliseconds (obviously).
> >I don't think there's any point in measuring time any more precisely,
> >because of the slowness and variances in the execution of Java itself.
> >More precision would be 'false precision' I think..
> 
> This is perpetuating a common misconception of Java, that Java is in some
> way 'limited'. Java is only as limited as its implementations - and in
> fact, it's not even that limited, since there's always the possibility of
> native code.
> 
> So here's a better (or at least more complete) answer - the JDK itself
> offers no methods for getting more precise time than milliseconds, but
> there maybe be a native code library or two that allow you to do better on
> FreeBSD. If there are not, it's not to hard to write your own.
> 
> Good luck,
> Chris
> >
> >-Archie
> >
> >___________________________________________________________________________
> >Archie Cobbs   *   Whistle Communications, Inc.  *   http://www.whistle.com
> >
> >
> >To Unsubscribe: send mail to majordomo@FreeBSD.org
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> >
> 
> 
> 
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