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  1. JDK
  2. JDK-8024649 Umbrella: Lambda linkage performance
  3. JDK-8024635

Caching MethodType's descriptor string improves lambda linkage performance

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    • b117
    • generic
    • generic

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      Description

        MethodType.toMethodDescriptorString() is frequently invoked when generating lambda classes from InnerClassLambdaMetafactory.
        Caching resulting string into the field of MethodType gives +5% - +10% to lambda linkage performance.

        Minor performance improvement: private method "checkPtype" was inlined and eliminated. "checkRtype" and "checkPtypes" were refactored for better perfomance in HotSpot interpreter (important for lambda linkage). overall result +1%.

        Attached webrev contains fix: please review.

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          1. webrev.zip
            113 kB
          2. webrev01.zip
            115 kB
          3. webrev02.zip
            115 kB

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                jrose John Rose
                skuksenko Sergey Kuksenko
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