rust-index: remove one collect when converting back
Turns out this is slightly faster. Sending the results back to Python is still
the most costly (like 75% of the time) of the whole method, but it's about
as fast as it can be now.
hg perf::phases on mozilla-try-2023-03-22
before: 0.267114
after: 0.247101
# tiny extension to report phase changes during transaction
def reposetup(ui, repo):
def reportphasemove(tr):
for revs, move in sorted(tr.changes[b"phases"], key=lambda r: r[0][0]):
for rev in revs:
if move[0] is None:
ui.write(
(
b'test-debug-phase: new rev %d: x -> %d\n'
% (rev, move[1])
)
)
else:
ui.write(
(
b'test-debug-phase: move rev %d: %d -> %d\n'
% (rev, move[0], move[1])
)
)
class reportphaserepo(repo.__class__):
def transaction(self, *args, **kwargs):
tr = super(reportphaserepo, self).transaction(*args, **kwargs)
tr.addpostclose(b'report-phase', reportphasemove)
return tr
repo.__class__ = reportphaserepo