annotate mercurial/demandload.py @ 879:953ccddd57bd
dirstate walking optimizations
The repo walking code introduces a number of calls to dirstate.map.copy(),
significantly slowing down the walk on large trees. When a list of
files is passed to the walking code, we should only look at map entries
relevant to the file list passed in.
dirstate.filterfiles() is added to return a subset of the dirstate map.
The subset includes in files passed in, and if one of the files requested
is actually a directory, it includes any files inside that directory tree.
This brings the time for hg diff Makefile down from 1.7s to .3s on
a linux kernel repo.
Also, the diff command was unconditionally calling makewalk, leading
to an extra pass through repo.changes. This patch avoids the call
to makewalk when commands.diff isn't given a list of patterns, cutting
the time for hg diff (with no args) in half.
Index: mine/mercurial/hg.py
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| author |
mason@suse.com |
| date |
Fri, 12 Aug 2005 07:10:21 -0800 |
| parents |
3db700146536 |
| children |
f3abe0bdccdd |
| rev |
line source |
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262
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1 def demandload(scope, modules):
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2 class d:
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3 def __getattr__(self, name):
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4 mod = self.__dict__["mod"]
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5 scope = self.__dict__["scope"]
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6 scope[mod] = __import__(mod, scope, scope, [])
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7 return getattr(scope[mod], name)
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8
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9 for m in modules.split():
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10 dl = d()
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11 dl.mod = m
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12 dl.scope = scope
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13 scope[m] = dl
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14
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