Merge pull request #458 from mdboom/fix-weekly-pgo

Use PGO on weekly builds

Merge pull request #456 from faster-cpython/no-pystats-warmups

Don't do warmups for pystats

Merge pull request #451 from faster-cpython/revert-450-no-warmups-pys…

…tats

Revert "Disable warmups during pystats"

Merge pull request #450 from mdboom/no-warmups-pystats

Disable warmups during pystats

Merge pull request #449 from mdboom/clear-pip-cache

Clear the pip cache before each run

Merge pull request #442 from mdboom/windows-git-rmtree

Use a special technique to remove git repos on Windows

Do find failures later

Update CHANGELOG

Merge pull request #439 from faster-cpython/dependabot/pip/ruamel-yam…

…l-0.18.11

Bump ruamel-yaml from 0.18.10 to 0.18.11

Merge pull request #395 from Yhg1s/synthesize_loops_script

Add synthesize_loops_file script