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  1. JDK
  2. JDK-7043987

JVMTI FollowReferences is slow

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    • Enhancement
    • Resolution: Fixed
    • P3
    • hs22
    • hs21
    • hotspot
    • None
    • b02
    • generic
    • generic
    • Not verified

    Backports

      Description

        A performance issue with the Hotspot implementation of FollowReferences causes
        it to be 10x slower than JROckit.

        There is an unnecessary reset of a "visited" flag on Java heap objects.
        The flag is reset even when no objects are ever marked as visited.

        See attached patch file and diffs for a suggested fix.

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                dcubed Daniel Daugherty
                phh Paul Hohensee
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