Karl Pauls created SLING-7175:
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Summary: Improve concurrency in FSDynamicClassLoader
Key: SLING-7175
URL: https://issues.apache.org/jira/browse/SLING-7175
Project: Sling
Issue Type: Improvement
Components: Commons
Affects Versions: File System ClassLoader 1.0.6
Reporter: Karl Pauls
Assignee: Karl Pauls
Fix For: File System ClassLoader 1.0.8
FSDynamicClassLoader currently maintains two synchronized sets of class names
that have been loaded ( a "hit" and a "miss" set). That can be a source of
contention when a lot of classes are loaded concurrently.
I think we can optimize this somewhat by a) merging the two sets into one (as
they are never used independently from what I can tell) and b) using a
Collections.newSetFromMap(new ConcurrentHashMap) instead of a
Collections.synchronizedSet(new HashSet()).
Furthermore, the isDirty boolean flag should be volatile as it might be
accessed concurrently.
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