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Posted to issues@cxf.apache.org by "Adam Anderson (JIRA)" <ji...@apache.org> on 2018/04/18 16:14:00 UTC

[jira] [Created] (CXF-7716) IBM Performance Team has found several performance increases

Adam Anderson created CXF-7716:
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             Summary: 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: 3.2.4, 3.0.15
            Reporter: Adam Anderson
             Fix For: 3.2.5


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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