What makes you think saving to a binary and loading from a binary would gain much efficiency. Right now parsing an in-memory XML string with libxml2 is close to 2 times faster than trying to copy the same preparsed xmlDocPtr subtree.
I can achieve 3x efficiency in loading raw data from disk compared to parsing the document by storing raw SAX events to a BerkeleyDB. The gain for small records is zero, but for 1 megabyte plus records the savings become significant.
Note that this isn't the DocPtr tree, I'm not debating that! :)
-- Rob
,'/:. Dr Robert Sanderson ([EMAIL PROTECTED])
,'-/::::. http://www.csc.liv.ac.uk/~azaroth/
,'--/::(@)::. Dept. of Computer Science, Room 805
,'---/::::::::::. University of Liverpool
____/:::::::::::::. I L L U M I N A T I Cheshire3 IR System: http://www.cheshire3.org/
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