Subject: Re: [xsl] Saxon performance difference in eClipse and App Server From: Fraser Goffin <goffinf@xxxxxxxxx> Date: Wed, 15 Dec 2010 16:56:08 +0000 |
Michael/Andrew, thanks for the advice. Moving away from using a DOMSource to a StreamSource has cut the App Server times from 700-800ms to 150-180ms, so that was really worthwhile. It also has a similar effect to the [same] code when I run it in eClipse, which now shows an average time of around 50ms. I'm still not sure why there remains a 3 to 4 times overhead for running the same code but at least in actual terms things are much better. I would now like to see if there is any further improvement possible by using Saxon's native tree as per Micael's suggestion (a hint to get me going would be helpful - do you mean using the S9 API (per the examples you provide ?) As you can see I use Templates since the XSLT is relatively stable and is executed 000's of times with different source XML (its always XML to XML transformation in this case). I wondered about pre-compiling the stylesheets and caching them instead, but I am slightly wary because of comments I have seen in other threads about how these might be specific to the version of the processor (ie. not guaranteed to be backwards compatible) ... and that it *may* not make much difference (although I guess perfromance is always about impirical results rather than guesses). What I am really trying to get to the bottom of here is whether the native language perfromance advantage of the integration platform that we are using is significant enough to suffer the need to recompile and redeploy larger parts of the application when changes are needed, or whether we can get adequate enough perfromance out of using XSLT and benefit from a less disruptive and potentially more flexible change capability. All of our messages are XML, and I kinda like the idea of using XML oriented processing tehnologies ... but maybe I'm just being stubborn. Regards Fraser.
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