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https://issues.apache.org/jira/browse/CXF-7716?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16471193#comment-16471193
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ASF GitHub Bot commented on CXF-7716:
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reta commented on issue #407: [CXF-7716] Reduce StringBuilders and other
performance changes.
URL: https://github.com/apache/cxf/pull/407#issuecomment-388198964
Thanks guys! @WhiteCat22 I will take care of back-porting to 3.1.x
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> IBM Performance Team has found several performance increases
> ------------------------------------------------------------
>
> Key: CXF-7716
> URL: https://issues.apache.org/jira/browse/CXF-7716
> Project: CXF
> Issue Type: Bug
> Components: JAX-RS
> Affects Versions: 3.0.15, 3.2.4
> Reporter: Adam Anderson
> Priority: Major
> Fix For: 3.2.5
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> Our performance team has identified several areas of improvement to reduce
> garbage collection and CPU usage.
> First, we reduced the amount of StringBuilders created in HTTPUtils.java and
> ResourceUtils.java.
> Second, we created JAXRSUtils.doMimeTypesIntersect() - a method similar to
> JAXRSUtils.intersectMimeTypes - that doesn't create a HashSet but instead
> returns a boolean when we just need to know if they intersect.
> Third, we found that getting the annotations for parameters to create
> constructor arguments in PerRequestResourceProvider.java is expensive, so we
> cache them in the constructor instead of getting them via reflection every
> request.
> These changes combined result in a ~1.5-2% performance increase.
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