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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 33650] - Jasper performance for multiple files processing
Date Mon, 22 Aug 2005 14:33:44 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=33650





------- Additional Comments From xbgao@cs.ucf.edu  2005-08-22 16:33 -------
(In reply to comment #30)
> As the current code only caches the result of the xml parsing it should 
> translates in roughly a 30% speedup for Liferay compilation.
> 

In my testcase with liferay source package (more specifically, all jsp files
under portal-web/docroot), I could get more than 30% speedup. I did a series of
experiments and the results were:

1. Dell Dimension 4600, 2.8GHz, 768M: time reduced from ~130s to ~65s.
2. one cluster node, AMD Athlon(tm) Processor, 908MHz, 768M: time reduced from
(12m + 50s) to (2m + 55s).

It depends on the machines but my cases show significant improvement.

> Liferay being static include happy, it is a good testcase as well. The xml 
> parsing was the easy part :) As Remy mentions there is load of improvement in 
> there as the JSP parsing is obviously not very efficient.
> 
> As a side note, I'm nit-picking but I think it would be better to have a 
> single method that returns the TreeNode. here I feel like they are 2 pieces of 
> code related to 'is cache in use'.
> 
> 1) getOptions().getCachedTldXmlMap() return the map or null
> 2) if (ctxt.getServletContext() instanceof 
> org.apache.jasper.servlet.JspCServletContext) is used to figure out if it 
> should look into the cache (why not checking if the map is null or not ?)
> 
> I might be missing something, but this if is confusing me.



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