[4suite] [ foursuite-Bugs-1523615 ] Matching with predicates on big nodesets tends to be glacial

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Bugs item #1523615, was opened at 2006-07-16 20:01
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Category: 4XSLT (Ft.Xml.Xslt.*)
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Matching with predicates on big nodesets tends to be glacial

Initial Comment:
Transforms involving XPath matching a large nodeset
then narrowing it down with a predicate may not run at
a usable speed, even for trivial cases.

For instance, for a document with a very large number
of <item/> nodes all attached to the <root/>, and the
following xsl fragments:
<xsl:template match="/root/item"><!-- fine
--></xsl:template>
<xsl:template match="/root/item[sub]"><!-- slow
--></xsl:template>
<xsl:template match="/root/item[sub/subsub]"><!-- might
never happen --></xsl:template>

Uche suggests the issue is that there are no
optimizations in effect for predicates, which is
something that should be thought about again after the
4Suite 1.0 release.

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You can respond by visiting: 
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