Bug 19910 - gzip runs faster without assembly
Summary: gzip runs faster without assembly
Keywords:
Status: CLOSED RAWHIDE
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: gzip
Version: 6.2
Hardware: i386
OS: Linux
low
medium
Target Milestone: ---
Assignee: Trond Eivind Glomsrxd
QA Contact: David Lawrence
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2000-10-27 13:56 UTC by Oren Tirosh
Modified: 2007-03-27 03:37 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
Clone Of:
Environment:
Last Closed: 2000-10-30 16:01:07 UTC
Embargoed:

Attachments (Terms of Use)

Description Oren Tirosh 2000-10-27 13:56:30 UTC 
Compression speed can be improved up to 27% by disabling the assembly
version of the match_longest function.  It appears that gcc does a better
job in optimizing the C version of that function.  Just disable the ASMV
define.  Decompression speed is not affected. Maintainers of the gzip
package have been notified.
Comment 1 Trond Eivind Glomsrxd 2000-10-30 03:44:51 UTC 
Weird - will investigate.
Comment 2 Trond Eivind Glomsrxd 2000-10-30 16:01:04 UTC 
Verified and turned off (with DEFS=-DNO_ASM).
Comment 3 Trond Eivind Glomsrxd 2000-10-30 16:09:44 UTC 
1.3-7 will eventually show up in Rawhide.
Comment 4 Daniel Roesen 2000-10-30 17:51:49 UTC 
so no "massive performance enhancement" official update in sight? :->
Comment 5 Trond Eivind Glomsrxd 2000-10-30 18:48:33 UTC 
Nah, it works correctly as shipped. Besides, most systems don't spend that much
time doing it. Now, if it was glibc....
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