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bug#40634: Massive pattern list handling with -E format seems very slow
From: |
Norihiro Tanaka |
Subject: |
bug#40634: Massive pattern list handling with -E format seems very slow since 2.28. |
Date: |
Fri, 17 Apr 2020 10:24:42 +0900 |
On Fri, 17 Apr 2020 09:35:36 +0900
Norihiro Tanaka <address@hidden> wrote:
>
> On Thu, 16 Apr 2020 16:00:29 -0700
> Paul Eggert <address@hidden> wrote:
>
> > On 4/16/20 3:53 PM, Norihiro Tanaka wrote:
> >
> > > I have had no idea to solve the problem yet. If we revert it, bug#33357
> > > will come back.
> >
> > Yes, I'd rather not revert if we can help it.
> >
> > My own thought was to not analyze the regular expression if we discover
> > that the input is empty. :-)
>
> Now, I have a idea, it is that we build indexes of epsilon nodes
> including in follows before remove epsilon nodes.
I wrote fix for the bug, but it will be slower then at grep 2.27 yet.
0001-dfa-build-auxiliary-indexes-before-remove-epsilon-cl.patch
Description: Text document
- bug#40634: Massive pattern list handling with -E format seems very slow since 2.28., fryasu, 2020/04/14
- bug#40634: Massive pattern list handling with -E format seems very slow since 2.28., Norihiro Tanaka, 2020/04/16
- bug#40634: Massive pattern list handling with -E format seems very slow since 2.28., Paul Eggert, 2020/04/16
- bug#40634: Massive pattern list handling with -E format seems very slow since 2.28., Norihiro Tanaka, 2020/04/16
- bug#40634: Massive pattern list handling with -E format seems very slow since 2.28., Paul Eggert, 2020/04/16
- bug#40634: Massive pattern list handling with -E format seems very slow since 2.28., Norihiro Tanaka, 2020/04/16
- bug#40634: Massive pattern list handling with -E format seems very slow since 2.28.,
Norihiro Tanaka <=
- bug#40634: Massive pattern list handling with -E format seems very slow since 2.28., Norihiro Tanaka, 2020/04/17
- bug#40634: Massive pattern list handling with -E format seems very slow since 2.28., Norihiro Tanaka, 2020/04/18
- bug#40634: Massive pattern list handling with -E format seems very slow since 2.28., Norihiro Tanaka, 2020/04/18
- bug#40634: Massive pattern list handling with -E format seems very slow since 2.28., fryasu, 2020/04/20