Re: Another regexp performance improvement: skip useless paren-captures

From: Mark Dilger <mark(dot)dilger(at)enterprisedb(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Andrew Dunstan <andrew(at)dunslane(dot)net>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Joel Jacobson <joel(at)compiler(dot)org>
Subject: Re: Another regexp performance improvement: skip useless paren-captures
Date: 2021-08-10 00:18:27
Message-ID: D41F1C85-D92C-4457-9D1D-1339F2EC95F9@enterprisedb.com
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> On Aug 9, 2021, at 5:14 PM, Mark Dilger <mark(dot)dilger(at)enterprisedb(dot)com> wrote:
>
> our $match;
> if ('foo' =~ m/((.)(??{ die; })){0}(..)/)

I left in a stray variable. A prior version of this script was assigning to $match where it now has die. Sorry for any confusion.

—
Mark Dilger
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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