Subject: RE: [xsl] Re: . in for From: "Michael Kay" <michael.h.kay@xxxxxxxxxxxx> Date: Sun, 6 Jan 2002 19:24:18 -0000 |
Dimitre wrote: > While your mapping operator will perform a series of > mappings, each producing an > intermediate sequence and may require too much memory, the > last function applies the > map function only once. The composition of all functions is > applied on every element > of $sequence and the resulting sequence is produced. No > additional memory for > intermediate sequences is necessary. > > This shows that it is better to have a map() function and a > composition operator for > expressions (in case XPath 2.0 will not fully support > higher-order functions). > As a point of information, the implementation of "for" expressions in Saxon 7.0 is fully pipelined, so there will never be a need to store intermediate sequences in memory. Mike Kay XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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