Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-6438254

Very slow performance from GZIPInputStream in JDK 1.5.0_07-b03

    Details

    • Type: Bug
    • Status: Closed
    • Priority: P3
    • Resolution: Not an Issue
    • Affects Version/s: 5.0u7
    • Fix Version/s: None
    • Component/s: core-libs
    • Labels:

      Description

      FULL PRODUCT VERSION :
      java version "1.5.0_07"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_07-b03)
      Java HotSpot(TM) Server VM (build 1.5.0_07-b03, mixed mode)

      ADDITIONAL OS VERSION INFORMATION :
        Verified with Fedora Core 3 and CentOS 4.3 on Xeon and Opteron:

      Linux fedoraxeon 2.6.12-1.1378_FC3smp #1 SMP Wed Sep 14 04:52:36 EDT 2005 i686 i686 i386 GNU/Linux

      Linux centosxeon 2.6.9-34.0.1.ELsmp #1 SMP Wed May 24 08:14:29 CDT 2006 i686 i686 i386 GNU/Linux

      Linux centosopteron 2.6.9-34.0.1.ELsmp #1 SMP Wed May 24 05:28:30 CDT 2006 x86_64 x86_64 x86_64 GNU/Linux

      A DESCRIPTION OF THE PROBLEM :
      Using GZIPInputStream to decompress a 60 MB file takes 5 or 6 times longer with JDK 1.5.0_07-b03 than with 1.5.0_06-b05 on the same machine.

      This looks like Bug ID 6348045 which had introduced slowness in 1.5.0_06 builds 03 and 04.


      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      Write a simple java program to decompress a file (previously written with GZIPOutputStream) and compare its performance on the current 1.5.0_07-b03 JDK versus 1.5.0_06-b05.


      REPRODUCIBILITY :
      This bug can be reproduced always.

      Release Regression From : 5.0u6
      The above release value was the last known release where this
      bug was not reproducible. Since then there has been a regression.

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                bristor Dave Bristor
                Reporter:
                gmanwanisunw Girish Manwani (Inactive)
              • Votes:
                0 Vote for this issue
                Watchers:
                0 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved:
                  Imported:
                  Indexed: