Subject: bug#40634: Massive pattern list handling with -E format seems very slow since 2.28.

From: Paul Eggert <[email-masked]>
Date: Thu, 16 Apr 2020 09:31:32 -0700

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?