ci: macos: Reduce test concurrency

Andres Freund <andres@anarazel.de>

Commit: 2d2f08310490d63c4cc097243ba63a1601316c17
Author: Andres Freund <andres@anarazel.de>
Date: 2022-10-01T23:55:16Z
Releases: 16.0
ci: macos: Reduce test concurrency

Test performance regresses noticably when using all cores. This is more
pronounced with meson than with autoconf, presumably because meson will
schedule the "full number" of tests more consistently.  8 seems to work
OK.

Discussion: https://postgr.es/m/20220927040208.l3shfcidovpzqxfh@awork3.anarazel.de
Backpatch: 15-, where CI was introduced

Files

PathChange+/−
.cirrus.yml modified +4 −1

Discussion