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Michael Kay wrote:
Just read your post Michael, and I was curious whether I could back this up. Taking the source as provided by Sujata, multiplying the <locus> elements and then multiplying the <trace> elements I had the following results:
I did not do real measuring, and my computer is at the same time running some long-term algorithm (takes days), so these approximations should in real life be considerably faster. I took the nested xsl:for-each loops as they were, without any optimizations at all.
So the new question is now: what is in the code that hasn't been shown?
Re: [xsl] Optimizing XSLT iteration
Subject: Re: [xsl] Optimizing XSLT iteration From: Abel Braaksma <abel.online@xxxxxxxxx> Date: Mon, 08 Oct 2007 03:07:25 +0200 |
Michael Kay wrote:
I just tried Saxon parser after increasing the initial/max Java heap space to 512M and it worked with even a 74MB file, but took about 28 minutes to finish.
That does seem quite high, given that Saxon can do an identity transform on a file of that size in something close to 28 seconds. I wonder if there is some other problem in your code (are there parts you haven't shown us?). Is the performance linear with document size?
Just read your post Michael, and I was curious whether I could back this up. Taking the source as provided by Sujata, multiplying the <locus> elements and then multiplying the <trace> elements I had the following results:
800 kilobytes: approx. 1 second 16 megabytes: approx 6 seconds 90 megabytes: approx 33 seconds
I did not do real measuring, and my computer is at the same time running some long-term algorithm (takes days), so these approximations should in real life be considerably faster. I took the nested xsl:for-each loops as they were, without any optimizations at all.
So the new question is now: what is in the code that hasn't been shown?
Cheers, -- Abel Braaksma
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