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 15:16:35
Message-ID: A7740739-B825-4378-9602-B79873830FBE@enterprisedb.com
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> On Aug 9, 2021, at 7:20 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> So I took another look at the code, and it doesn't seem that hard
> to make it act this way. The attached passes regression, but
> I've not beat on it with random strings.

I expect to get back around to testing this in a day or so.

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

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