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comparison mercurial/localrepo.py @ 43765:e89e3275f658

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localrepo: introduce a `_quick_access_changeid` property Having faster access to `null` is cute? but limited. We want to speedup access to more useful revision, like `.`. We start with turning the fast path for `null` into something more generic. Differential Revision: https://phab.mercurial-scm.org/D7488
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Sat, 23 Nov 2019 16:52:44 -0800
parents 3fd6ec54704c
children 888bd39ed555
comparison
equal deleted inserted replaced
43764:f9068413bd0c 43765:e89e3275f658
1512 1512
1513 def setnarrowpats(self, newincludes, newexcludes): 1513 def setnarrowpats(self, newincludes, newexcludes):
1514 narrowspec.save(self, newincludes, newexcludes) 1514 narrowspec.save(self, newincludes, newexcludes)
1515 self.invalidate(clearfilecache=True) 1515 self.invalidate(clearfilecache=True)
1516 1516
1517 @util.propertycache
1518 def _quick_access_changeid(self):
1519 """an helper dictionnary for __getitem__ calls
1520
1521 This contains a list of symbol we can recognise right away without
1522 further processing.
1523 """
1524 return {
1525 b'null': (nullrev, nullid),
1526 nullrev: (nullrev, nullid),
1527 nullid: (nullrev, nullid),
1528 }
1529
1517 def __getitem__(self, changeid): 1530 def __getitem__(self, changeid):
1518 # dealing with special cases 1531 # dealing with special cases
1519 if changeid is None: 1532 if changeid is None:
1520 return context.workingctx(self) 1533 return context.workingctx(self)
1521 if isinstance(changeid, context.basectx): 1534 if isinstance(changeid, context.basectx):
1529 for i in pycompat.xrange(*changeid.indices(len(self))) 1542 for i in pycompat.xrange(*changeid.indices(len(self)))
1530 if i not in self.changelog.filteredrevs 1543 if i not in self.changelog.filteredrevs
1531 ] 1544 ]
1532 1545
1533 # dealing with some special values 1546 # dealing with some special values
1534 if changeid == b'null' or changeid == nullrev or changeid == nullid: 1547 quick_access = self._quick_access_changeid.get(changeid)
1535 return context.changectx(self, nullrev, nullid, maybe_filtered=False) 1548 if quick_access is not None:
1549 rev, node = quick_access
1550 return context.changectx(self, rev, node, maybe_filtered=False)
1536 if changeid == b'tip': 1551 if changeid == b'tip':
1537 node = self.changelog.tip() 1552 node = self.changelog.tip()
1538 rev = self.changelog.rev(node) 1553 rev = self.changelog.rev(node)
1539 return context.changectx(self, rev, node) 1554 return context.changectx(self, rev, node)
1540 1555