perf: use the new setup function in "perfbookmarks"
This command was picked arbitrarily to display the usefulness of the new
feature. In my Mercurial repository (with very few bookmarks), moving cache
cleanup in the dedicated setup function has a visible and stable effect on
the benchmark number.
before: ! wall 0.000061 comb 0.000000 user 0.000000 sys 0.000000 (median of 40837)
after: ! wall 0.000058 comb 0.000000 user 0.000000 sys 0.000000 (median of 40500)
Our full contribution guidelines are in our wiki, please see:
https://www.mercurial-scm.org/wiki/ContributingChanges
If you just want a checklist to follow, you can go straight to
https://www.mercurial-scm.org/wiki/ContributingChanges#Submission_checklist
If you can't run the entire testsuite for some reason (it can be
difficult on Windows), please at least run `contrib/check-code.py` on
any files you've modified and run `python contrib/check-commit` on any
commits you've made (for example, `python contrib/check-commit
273ce12ad8f1` will report some style violations on a very old commit).