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

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Jim Meyering <jim <at> meyering.net>, Norihiro Tanaka <noritnk <at> kcn.ne.jp>, GNU grep developers <grep-devel <at> gnu.org>
Cc: fryasu <at> yahoo.co.jp, Gnulib bugs <bug-gnulib <at> gnu.org>, 40634 <at> debbugs.gnu.org
Subject: bug#40634: Massive pattern list handling with -E format seems very slow since 2.28.
Date: Fri, 11 Sep 2020 16:01:01 -0700

[Message part 1 (text/plain, inline)]

> And here is the adjusted patch:

Hold on, that looks like a cleanup of the April 18 patch posted here:

https://bugs.gnu.org/40634#26

But there's a later patch dated April 19, which Norihiro Tanaka said should be 
more correct and simpler:

https://bugs.gnu.org/40634#32

I'll try to take a look at the later patch.

[0001-dfa-minor-improvements-of-previous-change.patch (text/x-patch, attachment)]

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