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Performance of predicate-based patterns

Subject: Performance of predicate-based patterns
From: "Michael Kay mike@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 23 Jan 2015 11:28:21 -0000
 Performance of predicate-based patterns
We've started doing some performance work in Saxon on the DITA stylesheets,
which use large numbers of match patterns in the form

<xsl:template match="*[contains(@class, ' token ')]">

Currently these require a very inefficient sequential search to find the
matching rule for each element.

Does anyone know of any other commonly-used stylesheets (or even, uncommonly
used ones) which show similar characteristics, that is, large numbers of match
patterns using predicate matching only, with no explicit element names? We'd
like any optimizations we implement to be as general-purpose as possible.

Michael Kay
+44 (0) 118 946 5893

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