Re: XSL: For-Each Efficient or Not?

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Subject: Re: XSL: For-Each Efficient or Not?
From: "Vasu Chakkera" <vasucv@xxxxxxxxxxx>
Date: Mon, 01 Jul 2002 13:42:04 +0000

The use of xsl:apply-templates is considered better approach than <xsl:for-each> <xsl:for-each> (also called "pull processing") only works if you know exactly the structure of the XML that your stylesheet is going to process. But <xsl:apply-templates> is far more flexible. It defines rules for processing each kind of element wherever it occurs. This makes the stylesheet more resilient to changes in the source document structure, and better able to deal with semi-structured information where elements may occur in many different places. It also enables you to build up a library of template rules that can be re-used for many different transformations of many different document types.

---- This is taken from archives..(Michael Kay's Answer to the question of <xsl:for-each> or<xsl:appy-templates>??

From: Oleg Tkachenko <olegt@xxxxxxxxxxxxx>
Reply-To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re:  XSL: For-Each Efficient or Not?
Date: Mon, 01 Jul 2002 16:31:41 +0200
Schrooten, Ben wrote:
We have been trying to determine whether using XSL:For-Each is having an impact on the speed of our document publishing. Some of my buddies don't want to use xsl:for-each because they believe it causes the process to take a longer amount of time than just doing a template match over and over. Is this true or no? Is xsl:for-each a performance hog or does it and template matching take the same amount of time?
I believe that's quite opposite - for-each is only about to evaluate expression and instantiate instructions within for each selected node, but using apply-templates it's also nessesary to match appropriate template, probably to up new stack frame etc. That's usually not much overhead, but it does exist and depends on the processor implementation. Anyway that's not a reason to lose templates' virtues. Take a look at the list archive - there was a big discussion for-each vs templates this year.
--
Oleg Tkachenko
Multiconn International Ltd, Israel
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list

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Current Thread

Re: XSL Lint was: Schema Optimsations, (continued)
- Vasu Chakkera - Mon, 1 Jul 2002 09:42:16 -0400 (EDT) <=
- Schrooten, Ben - Mon, 1 Jul 2002 12:05:20 -0400 (EDT)
  - Tuan-Dung Cao - Wed, 10 Jul 2002 09:41:09 -0400 (EDT)
    - tpass001 - Wed, 10 Jul 2002 09:58:51 -0400 (EDT)
    - Tuan-Dung Cao - Wed, 10 Jul 2002 10:08:44 -0400 (EDT)

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RE: XSL: For-Each Efficient o, Michael Kay	Thread	RE: XSL: For-Each Efficient o, Schrooten, Ben
Re: XSL: For-Each Efficient o, Oleg Tkachenko	Date	testing for "other" elements , CROFT, MICHAEL
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