I don't know whether any of the changed areas are hot spots, but you could
change Workspace.py so that the methods like workingctx() are defined like
if Version.at_least(...):
def workingctx(self):
blah
else:
def workingctx(self):
otherblah
so that you wouldn't have to do the version check every time you called
workingctx().
In Version.py, I would probably drop the use of the re module, and just do
a try/except clause in _split_version() around the map() call.
I might also cache hgver (or even the result of at_least()), though if most
of the calls are done only once, then perhaps it's not necessary.
The rest looks fine, as best as I can tell.
Danek
