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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From: fryasu <at> yahoo.co.jp
To: "40634 <at> debbugs.gnu.org" <40634 <at> debbugs.gnu.org>
Subject: bug#40634: Massive pattern list handling with -E format seems very slow since 2.28.
Date: Mon, 20 Apr 2020 17:44:14 +0900 (JST)

Hi, 

I immediately tried the attached patch, and was able
to confirmthat grep perfomance is improved.


Our work to find thousands of patterns in a file with
tens of thousand lines is going extremely smoothly.


I'm glad for your quick response.

Thank you.
This bug report was last modified 4 years and 328 days ago.

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