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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Joel Jacobson <joel@compiler.org>
Cc: Chapman Flack <chap@anastigmatix.net>
Cc: pgsql-hackers@lists.postgresql.org
Subject: Re: Some regular-expression performance hacking
Date: Fri, 26 Feb 2021 13:55:10 -0500
Message-ID: <351243.1614365710@sss.pgh.pa.us> (raw)
In-Reply-To: <0e3addb8-415a-4e94-8294-c7ab86ad46d0@www.fastmail.com>
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"Joel Jacobson" <joel@compiler.org> writes:
> On Fri, Feb 26, 2021, at 01:16, Tom Lane wrote:
>> 0007-smarter-regex-allocation-2.patch

> I've successfully tested this patch.

Cool, thanks for testing!

> That's a 29% speed-up compared to HEAD! Truly amazing.

Hmm, I'm still only seeing about 10% or a little better.
I wonder why the difference in your numbers.  Either way,
though, I'll take it, since the main point here is to cut
memory consumption and not so much cycles.

			regards, tom lane





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