GNU bug report logs - #67022
Gzip decompression can be 60% faster using zlib's CRC32

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Package: gzip;

Reported by: Young Mo Kang <kym327 <at> gmail.com>

Date: Thu, 9 Nov 2023 17:42:01 UTC

Severity: normal

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

Full log

Message #11 received at submit <at> debbugs.gnu.org (full text, mbox):

From: wrotycz <wrotycz <at> wir.pl>
To: bug-gzip <bug-gzip <at> gnu.org>
Subject: Re: bug#67022: Gzip decompression can be 60% faster using zlib's CRC32
Date: Thu, 14 Mar 2024 02:14:54 +0100

[Message part 1 (text/plain, inline)]
I tried to implement this slice-by-8 CRC but couldn&#39;t do it the way I wanted - without bloated zlib tables and stuff. Maybe because I don&#39;t get what updcrc(), getcrc(), setcrc() are and what they actually do. The whole program is magical, there is no way to find do_de/compress(), nor anything like that, so it was difficult to actually find relevant code. But anyway, for a start I manged to make `makecrcs8.c&#39; to generate CRCs lookup table (attached).   Regards  wrotycz

[Message part 2 (text/html, inline)]
[makecrcs8.c (application/octet-stream, attachment)]
This bug report was last modified 100 days ago.

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