RE: xsl:number and performance

> 
> Hi Michael Kay and others,
> I found this link: 
> www.xml.com/pub/a/2001/04/25/xsltuk.html#performance. One of 
> your advices is don't use xsl:number. Why not? 
> 

Because a naïve implementation will have O(n^2) performance to number n
nodes. Using position() is always likely to be more efficient if it
gives the right answer. Of course techniques like
count(preceding-sibling::*) are also likely to suffer the same O(n^2)
problem.

Michael Kay


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