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https://issues.apache.org/jira/browse/JXPATH-178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14651537#comment-14651537
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Rico Neubauer commented on JXPATH-178:
--------------------------------------
Only can provide some high-level tests from our application, don't have a
self-contained test - see below.
Right, java.util.concurrent is not available on JXPath's current target,
recognized this after the patch. backport-util-concurrent could be an
alternative.
{panel}
- original (no patch)
10000 processes - 7:09 min.
20000 processes - 15:36 min.
50000 processes - 45:01 min.
- patched version
10000 processes - 7:04 min
20000 processes - 14:46 min
50000 processes - 42:01 min
{panel}
> Contention on functions can be reduced
> --------------------------------------
>
> Key: JXPATH-178
> URL: https://issues.apache.org/jira/browse/JXPATH-178
> Project: Commons JXPath
> Issue Type: Improvement
> Affects Versions: 1.3
> Reporter: Rico Neubauer
> Priority: Minor
> Labels: multithreaded
>
> Several series of thread dumps showed us that some avoidable synchronization
> in jxpath causes plenty of blocked threads waiting on the sync block under
> heavy load.
> Using concurrent map makes the things better.
> See this for a proposed fix:
> https://github.com/seeburger-ag/commons-jxpath/commit/eeb7f30f761a6a89e03c2c1421c09968412659af.diff
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