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.