Hi, The test I'm most commonly waiting for when doing a parallel make check is pg_upgrade. And to a significant degree that's because it uses the serial installcheck rather than installcheck-parallel.
Is there a reason to not use installcheck-parallel? serial: 19.42user 7.77system 1:53.23elapsed 24%CPU (0avgtext+0avgdata 111420maxresident)k parallel: 20.76user 7.72system 1:27.05elapsed 32%CPU (0avgtext+0avgdata 112300maxresident)k So, a saving of ~25s. ISTM we also should disable fsyncs for the postmaster instances. Wins another ~5s on my laptop, and I suspect it makes a larger difference on some of the buildfarm animals. Greetings, Andres Freund
