D5290: branchmap: refactor for better encapsulation

[mjpieters (Martijn Pieters)]

mjpieters added a comment.


  The goal of this refactor is to bring clarity to the branchmap cache behaviour, and to make it easier to add performance improvements (in an upcoming additional series of patches).

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D5290

To: mjpieters, #hg-reviewers
Cc: mercurial-devel