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comparison mercurial/posix.py @ 18442:ecba9b0e7672

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posix: don't compare atime when determining if a file has changed A file's atime might change even if the file itself doesn't change. This might cause us to invalidate caches more often than necessary. Before this change, hg add often resulted in the dirstate being parsed twice on systems that track atime. After this change, it is only parsed once. For a repository with over 180,000 files, this speeds up hg add from 1.2 seconds to 1.0.
author Siddharth Agarwal <sid0@fb.com>
date Fri, 18 Jan 2013 15:55:16 -0800
parents 0d5a22f73a1f
children a3b2dc1aa909
comparison
equal deleted inserted replaced
18441:1f794204abbd 18442:ecba9b0e7672
488 488
489 __hash__ = object.__hash__ 489 __hash__ = object.__hash__
490 490
491 def __eq__(self, other): 491 def __eq__(self, other):
492 try: 492 try:
493 return self.stat == other.stat 493 # Only dev, ino, size, mtime and atime are likely to change. Out
494 # of these, we shouldn't compare atime but should compare the
495 # rest. However, one of the other fields changing indicates
496 # something fishy going on, so return False if anything but atime
497 # changes.
498 return (self.stat.st_mode == other.stat.st_mode and
499 self.stat.st_ino == other.stat.st_ino and
500 self.stat.st_dev == other.stat.st_dev and
501 self.stat.st_nlink == other.stat.st_nlink and
502 self.stat.st_uid == other.stat.st_uid and
503 self.stat.st_gid == other.stat.st_gid and
504 self.stat.st_size == other.stat.st_size and
505 self.stat.st_mtime == other.stat.st_mtime and
506 self.stat.st_ctime == other.stat.st_ctime)
494 except AttributeError: 507 except AttributeError:
495 return False 508 return False
496 509
497 def __ne__(self, other): 510 def __ne__(self, other):
498 return not self == other 511 return not self == other