GNU bug report logs - #24715
Massive performance regression makes diff unusable

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Package: diffutils;

Reported by: Andreas Schwab <schwab <at> suse.de>

Date: Mon, 17 Oct 2016 13:04:01 UTC

Severity: normal

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

Bug is archived. No further changes may be made.

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Andreas Schwab <schwab <at> suse.de>
To: bug-diffutils <at> gnu.org
Subject: Massive performance regression makes diff unusable
Date: Mon, 17 Oct 2016 15:03:05 +0200

$ wc tmp.*
  6712297  27215448 135217073 tmp.1
  6712247  27215244 135216202 tmp.2
 13424544  54430692 270433275 total

$ diff --version | head -1
diff (GNU diffutils) 3.3
$ time diff -u tmp.* > xx
17.023user 8.246system 0m25.335selapsed 99.74%CPU

$ diff --version | head -1
diff (GNU diffutils) 3.5
$ time diff -u tmp.* > yy
5020.640user 3.176system 83m50.461selapsed 99.86%CPU

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab <at> suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
This bug report was last modified 8 years and 262 days ago.

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