Re: why matches($title,'.?(\.|,)\s$')) can perform s

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Subject: Re: why matches($title,'.*?(\.|,)\s*$')) can perform so much worse than matches($title,'(\.|,)\s*$'))
From: Michael Kay <mike@xxxxxxxxxxxx>
Date: Wed, 13 Jul 2011 19:17:44 +0100

On 13/07/2011 18:43, Oliver Hallam wrote:

That is interesting.  I was aware that there are some very smart regex
engines out there, but wasn't aware that they had made it to any
XQuery/XSLT processors yet.

For information, Saxon is using the Java regex engine (even on .NET), which isn't considered particularly smart by the regex cognoscenti.

(The XPath regular expression is translated into an equivalent Java regular expression in cases where the syntax differs).

Michael Kay
Saxonica

Current Thread

Re: why matches($title,'.*?(\.|,)\s*$')) can perform so much worse than matches($title,'(\.|,)\s*$')), (continued)
- Oliver Hallam - 13 Jul 2011 12:36:49 -0000
  - Alex Muir - 13 Jul 2011 12:55:27 -0000
  - Michael Kay - 13 Jul 2011 14:14:04 -0000
    - Oliver Hallam - 13 Jul 2011 17:46:37 -0000
    - Michael Kay - 13 Jul 2011 18:17:55 -0000 <=
    - Oliver Hallam - 13 Jul 2011 18:56:39 -0000
    - Liam R E Quin - 13 Jul 2011 23:13:08 -0000

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