Issue 28095: test_startup_imports of test_site fails on OS X due to new import of enum in re (original) (raw)

Issue28082, for 3.6.0b1, modified the re module to use enum.IntFlag. As described in Issue19325, on interpreter startup site.py imports sysconfig which, on OS X, imports _osx_support which imports, among other things, re. Now that re imports enum, a number of collections modules are also imported at startup on OS X which can have a negative performance impact. test_startup_imports of test_site was designed to catch situations like this ... and does.

For 3.6.0b1, I'm going to skip the failing part of the test on OS X only. For 3.6.0b2, I'll plan to revive languishing Issue19325 to at least try to remove the usage of re and then re-enable the skipped test.

The changes for bpo-29585 to speed up startup removed the import of _osx_support, and of re, from site.py so the disabled test does not fail in 3.7 and is now re-enabled. It's not appropriate to try to backport the startup speedup changes to 3.6, so the disabled portion of the test remains disabled on 3.6.x macOS.