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From "Jose Alberto Fernandez" <jalbe...@cellectivity.com>
Subject RE: New Launcher and JPackage RPMs
Date Fri, 16 Jan 2004 15:27:53 GMT
> From: Peter Reilly [mailto:peter.reilly@corvil.com] 
> 
> 
> Antoine Lévy-Lambert wrote:
> 
> > I am +1 to get this into ant 1.6.1.
> 
> (in relation to static map of jarfile->manifest class path in 
> AntClassLoader2).
> 
> Ok I will commit that.
> 
> Another optimization I tried was a quick hack to DefBase to have a 
> static field containing the default classloader, so it
> gets set once.  This did speed up the typedef the second and 
> subsequent 
> times and reduced the
> time for the test to 1.6 second (from 3 and thus below the 
> 1.5.4 times 
> (2 second) when using the crimson xml parser).
> However it is a complete hack, and does not deal with non-default 
> classpaths  like:
> <typedef classpath="${antlib.jar}" 
> resource="net/sf/antcontrib/antcontrib.properties"/>
> 

I have some none committed changes (at home) that provide
caching for classloaders based on the path object used to create it.

This would mean that all the classpaths reused by a refid will 
reuse the same classloader and hence improve performance.
At this point the WeakHashMap I am using is per Project instance
which would not help for <antcalls/> but I could change that.

Do you want me to submit that code? Maybe by tomorrow?

Jose Alberto


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