phases: update the phase set as we go during retract boundary
Apparently iterating over the `changed_revs` dictionary is very expensive.
On mozilla-try-2019-02-18, a perf::unbundle call with a 10 000 changesets
bundle gives give use the following timing.
e57d4b868a3e: 4.6 seconds
ac1c75188440: 102.5 seconds
prev-changeset: 30.0 seconds
this-changeset: 4.6 seconds
So, the performance regression is gone.
Once again: thanks to marvelous Python!
import unittest
from mercurial import mdiff
class splitnewlinesTests(unittest.TestCase):
def test_splitnewlines(self):
cases = {
b'a\nb\nc\n': [b'a\n', b'b\n', b'c\n'],
b'a\nb\nc': [b'a\n', b'b\n', b'c'],
b'a\nb\nc\n\n': [b'a\n', b'b\n', b'c\n', b'\n'],
b'': [],
b'abcabc': [b'abcabc'],
}
for inp, want in cases.items():
self.assertEqual(mdiff.splitnewlines(inp), want)
if __name__ == '__main__':
import silenttestrunner
silenttestrunner.main(__name__)