treemanifest: optimize treemanifest._walk() to skip directories
This makes treemanifest.walk() not visit submanifests that are known not to
have any matching files. It does this by calling match.visitdir() on
submanifests as it walks.
This change also updates largefiles to be able to work with this new behavior
in treemanifests. It overrides match.visitdir(), the function that dictates
how walk() and matches() skip over directories.
The greatest speed improvements are seen with narrower scopes. For example,
this commit speeds up the following command on the Mozilla repo from 1.14s
to 1.02s:
hg files -r . dom/apps/
Whereas with a wider scope, dom/, the speed only improves from 1.21s to 1.13s.
As with similar a similar optimization to treemanifest.matches(), this change
will bring out even bigger performance improvements once treemanifests are
loaded lazily. Once that happens, we won't just skip over looking at
submanifests, but we'll skip even loading them.
#!/usr/bin/env python
# Copyright 2010 Intevation GmbH
# Author(s):
# Thomas Arendsen Hein <thomas@intevation.de>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
"""Create a Mercurial repository in revlog format 0
changeset: 0:a1ef0b125355
tag: tip
user: user
date: Thu Jan 01 00:00:00 1970 +0000
files: empty
description:
empty file
"""
import os, sys
files = [
('formatv0/.hg/00changelog.i',
'000000000000004400000000000000000000000000000000000000'
'000000000000000000000000000000000000000000000000000000'
'0000a1ef0b125355d27765928be600cfe85784284ab3'),
('formatv0/.hg/00changelog.d',
'756163613935613961356635353036303562366138343738336237'
'61623536363738616436356635380a757365720a3020300a656d70'
'74790a0a656d7074792066696c65'),
('formatv0/.hg/00manifest.i',
'000000000000003000000000000000000000000000000000000000'
'000000000000000000000000000000000000000000000000000000'
'0000aca95a9a5f550605b6a84783b7ab56678ad65f58'),
('formatv0/.hg/00manifest.d',
'75656d707479006238306465356431333837353835343163356630'
'35323635616431343461623966613836643164620a'),
('formatv0/.hg/data/empty.i',
'000000000000000000000000000000000000000000000000000000'
'000000000000000000000000000000000000000000000000000000'
'0000b80de5d138758541c5f05265ad144ab9fa86d1db'),
('formatv0/.hg/data/empty.d',
''),
]
def makedirs(name):
"""recursive directory creation"""
parent = os.path.dirname(name)
if parent:
makedirs(parent)
os.mkdir(name)
makedirs(os.path.join(*'formatv0/.hg/data'.split('/')))
for name, data in files:
f = open(name, 'wb')
f.write(data.decode('hex'))
f.close()
sys.exit(0)