Re: pg_upgrade test chatter

On 2021-Oct-19, Tom Lane wrote:

> Yeah, my original thought had been to hack this at the test level.
> However, I felt like it'd be worth adding this code because we could
> apply it elsewhere in pg_regress.c to save several psql sessions
> (and hence backend starts) per regression DB creation.  That's not a
> huge win, but it'd add up.

Ah, yeah, that sounds like it can be significant under valgrind and
such, so +1.

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