Some simple performance results... (was-RE: stability of 1.8.3-dev?)

[Paul Nock <pn...@medicineplanet.com>]

On the subject of speed:

I did some simple tests with my setup:
XSP + 2 or 3 levels of XSLT.
XSP isn't very complex: I'm querying a few servlet parameters and stuff.
Pages are short: <2000 bytes each
Stylesheets are 20kb or so.

With 1.8.2 and Xalan1.2.2, I get average response of around 300-400ms, with
a standard deviation of 200-250ms (it varies a bit with my stylesheets)
With 1.8.3 and Saxon 6.2.1 and everything else the same, the average
response is about 20-30ms.  Standard deviation is also similarly improved.

Looking at the response graph, it's actually a lot better than this. The
Xalan response times are very wide - as shown by the standard deviation.
The Saxon response curve is pretty flat - very few big spikes in response.
For what it's worth, my result with Saxon seemed to be better than "FYI:
Relative Speeds of XSL Engines" from the archive, which was using Saxon
6.0.1.

Platform: Linux, Apache/Tomacat 3.2, Sun Jdk1.3
I used Jmeter to load test, using 100 clients and an average delay time of 7
seconds.

Paul

-----Original Message-----
From: Donald Ball [mailto:balld@webslingerZ.com]
Sent: Tuesday, March 06, 2001 1:25 PM
To: cocoon-users@xml.apache.org
Subject: Re: stability of 1.8.3-dev?


On Tue, 6 Mar 2001, Uli Mayring wrote:

> > no - SAXON can operate in DOM mode. basically, as long as you haven't
used
> > xalan-specific extensions and aren't relying on xalan improperly
> > processing bad XSLT (yes, there are a _few_ gotchas in xalan), you
should
> > be good to go.
>
> You haven't answered the question if you will indeed use Saxon instead of
> Xalan in 1.8.3 :)

me? i don't care to - xalan serves me needs just fine. i ensure that most
of my pages are being served from the cache, so a slower XSLT
transformation is fine with me. those of you who wish to go for extra
speed - please try the SAXON transformer and let us know what you think.
i'd recommend using ab or some other tool to simulate heavy load and see
what shakes out. personally, i have very little time to devote to cocoon
at the moment, i'd just as soon spend it on things that interest me (esql
and berin's new c2 database actions).

- donald


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