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Re: Java performance (Saxon)
Subject: Re: Java performance (Saxon) From: "Bill Rishel" <illusyn@xxxxxxxxxx> Date: Tue, 29 Feb 2000 17:55:53 -0800 |
Mike, I forwarded your message to my son, who until recently was on the JBuilder dev team at Inprise. His reply was: "Very perplexing. I wonder what kind of spin the hotspot compiler is giving his results." I'm not in a position to interpret much here as I am not a Java programmer. -Bill ----- Original Message ----- From: Kay Michael <Michael.Kay@xxxxxxx> To: <xsl-list@xxxxxxxxxxxxxxxx> Sent: Tuesday, February 29, 2000 9:21 AM Subject: Java performance (Saxon) > Slightly off-topic perhaps, for which I apologize, but I'm hoping someone > can help me shed some light on some Java performance figures. I've been > trying to make some performance improvements to Saxon, and have tested the > results using both Microsoft Java SDK and SUN JDK 1.2, both on the same Win > NT 4.0 box, with the following rather perplexing results (which are entirely > repeatable). There are 5 stylesheets A to E, with execution times as > follows, in seconds > > A B C D E > Saxon 5.2, Sun 9.4 15.9 19.3 20.1 5.3 > Saxon 5.2, MS 4.9 9.5 11.8 12.9 20.0 > Saxon 5.3, Sun 7.3 12.3 18.4 18.0 5.8 > Saxon 5.3, MS 3.1 5.2 19.0 10.8 19.8 > > All I can conclude from this is that there is a lot I don't know about the > different Java VMs! Stylesheet A is running twice as fast on MS as on Sun, > while Stylesheet E runs at barely a quarter of the speed. More worrying > still, my "improvements" have caused a very healthy speed-up of A and B, on > either VM, while on C they have made no difference on Sun but have made > things a lot worse on Microsoft. > > I thought I'd share this, firstly to show the difficulty of doing any kind > of performance comparisons even with one XSLT processor let alone between > processors, and secondly in the hope that someone might be able to point me > in the direction of resources that will help me understand what's going on. > Any suggestions? > > Mike Kay > > > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list > XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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