On 08/09/2011 09:59, Adrian Gonzalez wrote:
> Just downloaded JProfiler eval.
> 
> Compared tagfile performance between 7.0.21 and 7.0.trunk (this one this time 
> : http://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk/)
> 
> With your optimization, we achieve a 24% performance gain - nice ;) 
> 
> Test         7.0.21    7.0.trunk
> tagfile       267ms      206ms
> 
> You can see JConsole output
>  * 7.0.21 : http://imageshack.us/photo/my-images/233/tagperftagfile7021.jpg/
>  * 7.0.trunk : 
> http://imageshack.us/photo/my-images/52/tagperftagfile70trunk.jpg/
> 
> Tests were made with 
> http://localhost:8080/tagfilesperf/generated/edit-tagfile.jsp
> 
> 
> One more question though : 
> Do you think we can cache ValueExpression instances ?

The parsed expressions are already cached. I don't think there is any
scope for further caching here.

I'll take another look with the profiler just to be sure.

Mark

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