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  1. JDK
  2. JDK-8273585

String.charAt performance degrades due to JDK-8268698

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    • 18
    • b21

    Description

      The attached program shows that the performance degradation over 100% after JDK-8268698.

      The result of
      "time linux-x86_64-server-release/images/jdk/bin/java Test":

      Before JDK-8268698,
          real 0m8.369s
          user 0m8.386s
          sys 0m0.019s

      After JDK-8268698,
          real 0m19.722s
          user 0m19.748s
          sys 0m0.013s

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-8290432 C2 compilation fails with assert(node->_last_del == _last) failed: must have deleted the edge just produced

          • P3 - Major loss of function.
          • Resolved

          Enhancement - null JDK-8297307 Add IR verification test for JDK-8273585

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Open

          Enhancement - null JDK-8268698 Use Objects.check{Index,FromToIndex,FromIndexSize} for java.base

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved
          links to

          Commit Commit openjdk/jdk/b0d1e4ff

          Review Review openjdk/jdk/6096

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              yyang Yi Yang
              jzhu Joshua Zhu
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              Dates

                Created:
                Updated:
                Resolved: