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

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Mark Dilger <mark(dot)dilger(at)enterprisedb(dot)com>
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: 2021-08-08 22:28:13
Message-ID: 3289730.1628461693@sss.pgh.pa.us
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Mark Dilger <mark(dot)dilger(at)enterprisedb(dot)com> writes:
> I have applied your latest patch and do not see any problems with it. All my tests pass with no asserts and with no differences in results vs. master. This is a test suite of nearly 1.5 million separate regular expressions.

Cool, thanks. I also tried your millions-of-random-regexps script
and didn't find any difference between the results from HEAD and
those from the v3 patch.

regards, tom lane

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