GNU bug report logs - #40634
Massive pattern list handling with -E format seems very slow since 2.28.

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Package: grep;

Reported by: fryasu <at> yahoo.co.jp

Date: Wed, 15 Apr 2020 02:21:01 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 #14 received at 40634 <at> debbugs.gnu.org (full text, mbox):

From: Norihiro Tanaka <noritnk <at> kcn.ne.jp>
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: fryasu <at> yahoo.co.jp, 40634 <at> debbugs.gnu.org
Subject: Re: bug#40634: Massive pattern list handling with -E format seems
 very slow since 2.28.
Date: Fri, 17 Apr 2020 07:53:12 +0900

On Thu, 16 Apr 2020 09:31:32 -0700
Paul Eggert <eggert <at> cs.ucla.edu> wrote:

> On 4/15/20 11:56 PM, Norihiro Tanaka wrote:
> 
> > It seems to a lot of time is spent in dfa.c:replace().
> > It was added at d6df3873c7abc243683d0e8fccbfde4e76f23e53 in gnulib.
> 
> It would be pretty drastic to revert that patch. Is there some better way to move forward?

I have had no idea to solve the problem yet.  If we revert it, bug#33357
will come back.
This bug report was last modified 4 years and 328 days ago.

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