Subject: RE: [xsl] Use predicates/patterns or xsl:choose (was:] Stylesheet optimisation) From: "Michael Kay" <mike@xxxxxxxxxxxx> Date: Tue, 11 Jan 2005 17:15:31 -0000 |
I don't think I would give the same advice today. I wouldn't expect it to make much difference in performance (certainly, there's no intrinsic reason why it should make a difference), and stylistically, using multiple template rules is often much clearer. Michael Kay http://www.saxonica.com/ > -----Original Message----- > From: christof.hoeke@xxxxxxx [mailto:christof.hoeke@xxxxxxx] > Sent: 11 January 2005 15:27 > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx > Subject: [xsl] Use predicates/patterns or xsl:choose (was:] > Stylesheet optimisation) > > Hi again, > I was reading up all stuff about optimizing the performance > of xslt. One basic advice I found is: > > "Avoid complex patterns in template rules. Instead, use > <xsl:choose> within the rule." > > (Mike Kay at > http://www.dpawson.co.uk/xsl/sect4/N9883.html#d12447e254) > > This seems quite old (before July 2000), and I wondered if it > is still true with newer Saxon or Xalan versions. > > I rather split complex templates in more than one and adjust > the match patterns accodingly to shorten and simplify the > actual code inside the xsl:template. So I try to avoid using > xsl:choose or xsl:if areas as much as possible as they make > the stylesheet sometimes quite difficult to read and maintain. > And I was under the impression that splitting complex > templates in easier ones by making the match as precise as > possible would also be quicker as I (naively) thought the > processor does something like a lookup table before actually > performing the transformation. > > So, is it still better to avoid complex patterns or am I > understanding the advice in the wrong way? > > Thanks a lot > Chris
Current Thread |
---|
|
<- Previous | Index | Next -> |
---|---|---|
Re: [xsl] Use predicates/patterns o, Geert Josten | Thread | [xsl] Xalan Java 2: doesn't seem to, Ross, Douglas |
RE: [xsl] Multiple IDs, Michael Kay | Date | RE: [xsl] Use predicates/patterns o, Michael Kay |
Month |