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  1. JDK
  2. JDK-6507118

REGRESSION: Testcase from CR 6348045 runs much slower on Java SE 6 than on J2SE 5

    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2
    • Resolution: Won't Fix
    • Affects Version/s: 6
    • Fix Version/s: None
    • Component/s: core-libs
    • Labels:

      Description

      The testcase which is attached at CR 6348045 runs much slower on Java SE 6 than on J2SE 5.

      $ java -showversion PerformanceTest
      java version "1.5.0_10"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_10-b03)
      Java HotSpot(TM) Server VM (build 1.5.0_10-b03, mixed mode)

      Time needed for copy the archive :154626 ms

      $ java -showversion PerformanceTest
      java version "1.6.0"
      Java(TM) SE Runtime Environment (build 1.6.0-b105)
      Java HotSpot(TM) Server VM (build 1.6.0-b105, mixed mode)

      Time needed for copy the archive :532257 ms

      hprof output from JDK 5u10:
      rank self accum count trace method
         1 72.13% 72.13% 6261 300060 java.util.zip.Deflater.deflateBytes
         2 15.39% 87.52% 1336 300067 java.util.zip.CRC32.updateBytes
         3 2.09% 89.61% 181 300069 java.util.zip.Deflater.deflateBytes
         4 1.38% 90.99% 120 300066 PerformanceTest.startTest

      hprof output from JDK 6:
      rank self accum count trace method
         1 57.52% 57.52% 14852 300056 java.util.zip.ZipFile.read
         2 31.27% 88.79% 8074 300054 java.util.zip.Deflater.deflateBytes
         3 6.71% 95.50% 1733 300053 java.util.zip.CRC32.updateBytes
         4 0.62% 96.12% 160 300067 java.util.zip.Deflater.deflateBytes
         5 0.34% 96.46% 89 300060 java.util.zip.DeflaterOutputStream.deflate
         6 0.34% 96.80% 88 300063 PerformanceTest.startTest

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              • Assignee:
                Unassigned
                Reporter:
                jloefflm Johann Löfflmann (Inactive)
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                • Created:
                  Updated:
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