Bug 19910 - gzip runs faster without assembly
gzip runs faster without assembly
Product: Red Hat Linux
Classification: Retired
Component: gzip (Show other bugs)
i386 Linux
low Severity medium
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Assigned To: Trond Eivind Glomsrxd
David Lawrence
: FutureFeature
Depends On:
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Reported: 2000-10-27 09:56 EDT by Oren Tirosh
Modified: 2007-03-26 23:37 EDT (History)
1 user (show)

See Also:
Fixed In Version:
Doc Type: Enhancement
Doc Text:
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Last Closed: 2000-10-30 11:01:07 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Oren Tirosh 2000-10-27 09:56:30 EDT
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 2000-10-29 22:44:51 EST
Weird - will investigate.
Comment 2 Trond Eivind Glomsrxd 2000-10-30 11:01:04 EST
Verified and turned off (with DEFS=-DNO_ASM).
Comment 3 Trond Eivind Glomsrxd 2000-10-30 11:09:44 EST
1.3-7 will eventually show up in Rawhide.
Comment 4 Daniel Roesen 2000-10-30 12:51:49 EST
so no "massive performance enhancement" official update in sight? :->
Comment 5 Trond Eivind Glomsrxd 2000-10-30 13:48:33 EST
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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