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From Jesse Glick <>
Subject AntClassLoader performance problem
Date Tue, 25 Mar 2014 14:17:41 GMT
Just an FYI that resource loading in AntClassLoader can be extremely
inefficient; this change

in a modular system resulted in a 2–3 order of magnitude (!)
improvement in resource lookup times.

has an explanation. (I am not convinced that patch is the right
solution; perhaps it is the findResources method which should be
corrected, or perhaps Jenkins is misusing ACL.)

Whether this would really affect Ant builds is dubious; the problem
arises when you have a DAG of class loaders with a lot of alternate
pathways to the root.

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