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* xpath.c: Optimized xmlXPathNodeCollectAndTest() and xmlXPathNodeCollectAndTestNth() to evaluate a compound traversal of 2 axes when we have a "//foo" expression. This is done with a rewrite of the XPath AST in xmlXPathRewriteDOSExpression(); I added an additional field to xmlXPathStepOp for this (but the field's name should be changed). The mechanism: the embracing descendant-or-self axis traversal (also optimized to return only nodes which can hold elements), will produce context nodes for the inner traversal of the child axis. This way we avoid a full node-collecting traversal of the descendant-or-self axis. Some tests indicate that this can reduce execution time of "//foo" to 50%. Together with the XPath object cache this all significantly speeds up libxslt.
XML toolkit from the GNOME project
Full documentation is available on-line at
http://xmlsoft.org/
This code is released under the MIT Licence see the Copyright file.
To build on an Unixised setup:
./configure ; make ; make install
To build on Windows:
see instructions on win32/Readme.txt
To assert build quality:
on an Unixised setup:
run make tests
otherwise:
There is 3 standalone tools runtest.c runsuite.c testapi.c, which
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Daniel Veillard
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