Subject: RE: Netscape Support for XSL From: Matt Sergeant <matt@xxxxxxxxxxxx> Date: Fri, 19 May 2000 16:10:11 +0100 (BST) |
On Fri, 19 May 2000, Heather Lindsay wrote: > Matt, > If it's not too much trouble could you elaborate on this speed > penalty you speak of? How much of a speed penalty is it? > > Thanks, > Heather Most XSLT servlets out there are fairly dumb, requiring a parse of every stylesheet file and the XML file on every hit, along with performing the actual transformation. Some may eliminate the need to re-parse the XML + stylesheets on each hit by using an internal memory cache of the parsed DOM tree, but still perform the XSLT transformation on each hit. On the other hand, both AxKit and Cocoon only transform when either the stylesheet(s) or the xml file changes, storing the results in a cache. This allows AxKit to achieve delivery rates of 100m page views a day (nobody is running a site using AxKit that does that, but the point is still valid), on the right hardware. I don't have any performance figures for Cocoon, although I believe it's slightly slower than AxKit (but I'm biased!). Just to throw more AxKit advertising in... AxKit also invalidates the cache when external parsed entities in the XML file change - a feature that Cocoon doesn't have (and I believe won't get, according to a post on their mailing list). This eliminates the need to "touch" the XML file if you change an external entity - a great boon for larger documents. AxKit can be found at http://xml.sergeant.org/axkit/ Cocoon is at http://xml.apache.org/cocoon/ AxKit is built in Perl using the Apache API, Cocoon is built as a servlet. Which seems kindof backwards when Cocoon is part of the Apache project ;-) -- <Matt/> Fastnet Software Ltd. High Performance Web Specialists Providing mod_perl, XML, Sybase and Oracle solutions Email for training and consultancy availability. http://sergeant.org http://xml.sergeant.org XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
Current Thread |
---|
|
<- Previous | Index | Next -> |
---|---|---|
HTML entities, James Lynn | Thread | Server-side. Performance Re: Netsca, Paul Tchistopolskii |
Re: Netscape Support for XSL - clie, Dan Morrison | Date | [ANNOUNCE] AxKit 0.65, Matt Sergeant |
Month |