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https://issues.apache.org/jira/browse/OAK-4421?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Mueller updated OAK-4421:
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Attachment: OAK-4421-v3.patch
Updated patch (incompatibilities fixed)
> Optimize Revison fromString and toString implementation
> -------------------------------------------------------
>
> Key: OAK-4421
> URL: https://issues.apache.org/jira/browse/OAK-4421
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: documentmk
> Reporter: Chetan Mehrotra
> Assignee: Chetan Mehrotra
> Labels: performance
> Fix For: 1.6
>
> Attachments: OAK-4421-v1.patch, OAK-4421-v2.patch, OAK-4421-v3.patch,
> hot-methods.png, revision-fromstring-caller.png
>
>
> Current implementation of Revision {{fromString}} and {{toString}} make use
> of std JDK API to perform string manipulation. While running some performance
> test it was seen that these 2 methods are called quite frequently and that
> adds up to some decent times. Further they also generate quite a bit of short
> lived objects.
> !hot-methods.png!
> It would be worthwhile to perform a micro benchmark of these method and
> optimize them further such that they perform better and also generate less
> garbage. The micro optimized code would be bit more complex but if
> performance numbers are better we can look into changing the current
> implementation
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