From: Tom Lane <tgl@sss.pgh.pa.us>
To: Joel Jacobson <joel@compiler.org>
Cc: pgsql-hackers@lists.postgresql.org
Subject: Re: Some regular-expression performance hacking
Date: Sat, 13 Feb 2021 12:35:45 -0500
Message-ID: <1662033.1613237745@sss.pgh.pa.us> (raw)
In-Reply-To: <85140bfb-516c-449b-8a03-7930abb42b88@www.fastmail.com>
References: <1340281.1613018383@sss.pgh.pa.us>
<85140bfb-516c-449b-8a03-7930abb42b88@www.fastmail.com>
"Joel Jacobson" <joel@compiler.org> writes:
> In total, I scraped the first-page of some ~50k websites,
> which produced 45M test rows to import,
> which when GROUP BY pattern and flags was reduced
> down to 235k different regex patterns,
> and 1.5M different text string subjects.
This seems like an incredibly useful test dataset.
I'd definitely like a copy.
> No is_match differences were detected, good!
Cool ...
> However, there were 23 cases where what got captured differed:
I shall take a closer look at that.
Many thanks for doing this work!
regards, tom lane
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, joel@compiler.org, pgsql-hackers@lists.postgresql.org
Subject: Re: Some regular-expression performance hacking
In-Reply-To: <1662033.1613237745@sss.pgh.pa.us>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox