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

[Mark Dilger]

> On Aug 8, 2021, at 1:25 PM, Tom Lane <t...@sss.pgh.pa.us> wrote:
> 
> Ugh.  The regex engine is finding the match correctly, but it's failing to
> tell the caller where it is :-(.  I was a little too cute in optimizing
> the regmatch_t result-vector copying in pg_regexec, and forgot to ensure
> that the overall match position would be reported.
> 
> Thanks for the testing!

Sure!  Thanks for improving the regular expression engine!

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.

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