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xom-interest - RE: [XOM-interest] Performance of Java XPath engines

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Subject: XOM API for Processing XML with Java

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  • From: "Michael Kay" <mike AT saxonica.com>
  • To: "'Michael Kay'" <mike AT saxonica.com>, "'shirasu hiroyuki'" <hirsh AT s9.dion.ne.jp>
  • Cc: xom-interest AT lists.ibiblio.org
  • Subject: RE: [XOM-interest] Performance of Java XPath engines
  • Date: Wed, 19 Jan 2005 09:58:05 -0000

> (For many of these expressions, I suspect the cost is dominated by
> compile-time costs. In fact, many of them will be be
> completely evaluated at compile time.)

I note that Jaxen is showing execution times of 0 for many of the "constant
expressions" that can be evaluated statically. Perhaps -- I'm speculating
wildly -- this is because it's caching the compiled expression, so it's
really only executing the query once?

Michael Kay
http://www.saxonica.com/





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