Subject: Re: [xsl] Several rules vs a single rule with a choose operator From: tcn@xxxxxxxxxxxxx (Trevor Nash) Date: Sun, 29 Jul 2001 10:29:23 GMT |
In terms of speed, I doubt there is much in it - in general XSLT processors get slower as you give them more templates to look at, but that is not a universal law, just a feature of the algorithms curently in use. If I had to guess I would pick the 'choose' variant, though I would want to know what the node-test and conditions look like. If the difference is *really* important to you then you need to run a test with the real system, as you are quite likely to get different answers according to exactly what the rest of your stylesheet contains, what the node tests and conditions actually are, and what is in the input (how many times this template is fired in comparison to the rest). You might even get different answers on different machines. My advice would be to choose the method that is going to be easiest to change - probably the separate templates route. As to performance, it is true for most software systems that time spent getting the overall design right is much more valuable than time spent on the minute details of implementation. In short, stop worrying about it. >Hello, friends. > >How do you think, which of the following two approaches >is more effective (particularly, for MSXML): > > <xsl:template match="node-test[condition2]" priority="2"> You only need the priority if condition1 and condition2 are not mutually exclusive. In which case I wonder why you are not testing the common part in the 'choose' method? > result2 > </xsl:template> > <xsl:template match="node-test[condition1]" priority="1"> > result1 > </xsl:template> > <xsl:template match="node-test"> > result0 > </xsl:template> > >or > > <xsl:template match="node-test"> > <xsl:choose> > <xsl:when test="condition2">result2</xsl:when> > <xsl:when test="condition1">result1</xsl:when> > <xsl:otherwise>result0</xsl:otherwise> > </xsl:choose> > </xsl:template> > >The effectiveness question is important in my case, >since I employ a large set of template rules >and, moreover, apply it several times per request. > >Thanks. Regards, Trevor Nash -- Traditional training & distance learning, Consultancy by email Melvaig Software Engineering Limited voice: +44 (0) 1445 771 271 email: tcn@xxxxxxxxxxxxx XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
Current Thread |
---|
|
<- Previous | Index | Next -> |
---|---|---|
RE: [xsl] Several rules vs a single, Michael Kay | Thread | RE: [xsl] Several rules vs a single, Alexander Gutman |
Re: [xsl] generating a repeatable u, Michael Beddow | Date | Re: [xsl] generating a repeatable u, Colin Muller |
Month |