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  1. JDK
  2. JDK-8039124

j.u.regex.Matcher.appendReplace/Tail() should support StringBuilder variant for better performance

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    • Enhancement
    • Status: Closed
    • P4
    • Resolution: Fixed
    • None
    • 9
    • core-libs
    • b08
    • Verified

    Description

      The Matcher class has a few public methods that take StringBuffers,
      and we've found it useful to add similar versions that take StringBuilders.

      It has two benefits:

      - Users don't have to convert from one to the other when they want to use
      the method in question. The symmetry is nice.

      - The StringBuilder variants are faster (if lock optimizations don't kick
      in, which happens in the interpreter and the client compiler). For
      interpreted / client-compiled code, we saw something like a 25% speedup on
      String.replaceAll(), which calls into this code.

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              sherman Xueming Shen
              sherman Xueming Shen
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                Created:
                Updated:
                Resolved: