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From Sylvain Wallez <>
Subject TreeProcessor speed
Date Tue, 22 Jan 2002 11:08:18 GMT
Hi team,

I just did some time measurements to compare the compiled and 
interpreted sitemap engines. The tests were done on a 1GHz Win2K PC 
running JDK 1.3.1/server hotspot and Tomcat 4.0.

I used "ab" to load-test two pages with 1000 requests :
- the welcome page (cocoon/welcome) which involves a simple 
generate/transform/serialize pipeline
- the main docs page (cocoon/documents/index.html) which is a huge 
aggregation of "cocoon:" sources.

Several 1000 page requests were run and their result ignored to allow 
the hotspot to do its job.

The results are as follows, in requets/second :

page     |  compiled  |interpreted |
welcome  |   105      |    115     |
docs     |    37      |     35     |

These results are quite encouraging since simple pipelines are a faster 
in interpreted mode.

For the "docs" page, I have to check the code for both aggregate and 
cocoon: to gain the few millisecs that are needed to beat the compiled 
engine ;


Sylvain Wallez
Anyware Technologies -

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