##// END OF EJS Templates
pathcopies: give up any optimization based on `introrev`...
pathcopies: give up any optimization based on `introrev` Between 8a0136f69027 and d98fb3f42f33, we sped up the search for the introduction revision during path copies. However, further checking show that finding the introduction revision is still expensive and that we are better off without it. So we simply drop it and only rely on the linkrev optimisation. I ran `perfpathcopies` on 6989 pair of revision in the pypy repository (`hg perfhelper-pathcopies`. The result is massively in favor of dropping this condition. The result of the copy tracing are unchanged. Attempt to use a smaller changes preserving linkrev usage were unsuccessful, it can return wrong result. The following changesets broke test-mv-cp-st-diff.t - if not f.isintroducedafter(limit): + if limit >= 0 and f.linkrev() < limit: return None Here are various numbers (before this changeset/after this changesets) source destination before after saved-time ratio worth cases e66f24650daf 695dfb0f493b 1.062843 1.246369 -0.183526 1.172675 c979853a3b6a 8d60fe293e79 1.036985 1.196414 -0.159429 1.153743 22349fa2fc33 fbb1c9fd86c0 0.879926 1.038682 -0.158756 1.180420 682b98f3e672 a4878080a536 0.909952 1.063801 -0.153849 1.169074 5adabc9b9848 920958a93997 0.993622 1.147452 -0.153830 1.154817 worse 1% dbfbfcf077e9 aea8f2fd3593 1.016595 1.082999 -0.066404 1.065320 worse 5% c95f1ced15f2 7d29d5e39734 0.453694 0.471156 -0.017462 1.038488 worse 10% 3e144ed1d5b7 2aef0e942480 0.035140 0.037535 -0.002395 1.068156 worse 25% 321fc60db035 801748ba582a 0.009267 0.009325 -0.000058 1.006259 median 2088ce763fc2 e6991321d78b 0.000665 0.000651 0.000014 0.978947 best 25% 915631a97de6 385b31354be6 0.040743 0.040363 0.000380 0.990673 best 10% ad495c36a765 19c10384d3e7 0.431658 0.411490 0.020168 0.953278 best 5% d13ae7d283ae 813c99f810ac 1.141404 1.075346 0.066058 0.942126 best 1% 81593cb4a496 99ae11866969 1.833297 0.063823 1.769474 0.034813 best cases c3b14617fbd7 743a0fcaa4eb 1101.811740 2.735970 1099.075770 0.002483 c3b14617fbd7 9ba6ab77fd29 1116.753953 2.800729 1113.953224 0.002508 058b99d6e81f 57e249b7a3ea 1246.128485 3.042762 1243.085723 0.002442 9a8c361aab49 0354a250d371 1253.111894 3.085796 1250.026098 0.002463 442dbbc53c68 3ec1002a818c 1261.786294 3.138607 1258.647687 0.002487 As one can see, the average case is not really impacted. However, the worth case we get after this changeset are much better than the one we had before it. We have 30 pairs where improvements are above 10 minutes. This reflect in the combined time for all pairs before: 26256s after: 1300s (-95%) If we remove these pathological 30 cases, we still see a significant improvements: before: 1631s after: 1245s (-24%)

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cvs.py
335 lines | 11.2 KiB | text/x-python | PythonLexer
# cvs.py: CVS conversion code inspired by hg-cvs-import and git-cvsimport
#
# Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import
import errno
import os
import re
import socket
from mercurial.i18n import _
from mercurial.pycompat import (
getattr,
open,
)
from mercurial import (
encoding,
error,
pycompat,
util,
)
from mercurial.utils import (
dateutil,
procutil,
)
from . import (
common,
cvsps,
)
stringio = util.stringio
checktool = common.checktool
commit = common.commit
converter_source = common.converter_source
makedatetimestamp = common.makedatetimestamp
NoRepo = common.NoRepo
class convert_cvs(converter_source):
def __init__(self, ui, repotype, path, revs=None):
super(convert_cvs, self).__init__(ui, repotype, path, revs=revs)
cvs = os.path.join(path, b"CVS")
if not os.path.exists(cvs):
raise NoRepo(_(b"%s does not look like a CVS checkout") % path)
checktool(b'cvs')
self.changeset = None
self.files = {}
self.tags = {}
self.lastbranch = {}
self.socket = None
self.cvsroot = open(os.path.join(cvs, b"Root"), b'rb').read()[:-1]
self.cvsrepo = open(os.path.join(cvs, b"Repository"), b'rb').read()[:-1]
self.encoding = encoding.encoding
self._connect()
def _parse(self):
if self.changeset is not None:
return
self.changeset = {}
maxrev = 0
if self.revs:
if len(self.revs) > 1:
raise error.Abort(
_(
b'cvs source does not support specifying '
b'multiple revs'
)
)
# TODO: handle tags
try:
# patchset number?
maxrev = int(self.revs[0])
except ValueError:
raise error.Abort(
_(b'revision %s is not a patchset number') % self.revs[0]
)
d = encoding.getcwd()
try:
os.chdir(self.path)
cache = b'update'
if not self.ui.configbool(b'convert', b'cvsps.cache'):
cache = None
db = cvsps.createlog(self.ui, cache=cache)
db = cvsps.createchangeset(
self.ui,
db,
fuzz=int(self.ui.config(b'convert', b'cvsps.fuzz')),
mergeto=self.ui.config(b'convert', b'cvsps.mergeto'),
mergefrom=self.ui.config(b'convert', b'cvsps.mergefrom'),
)
for cs in db:
if maxrev and cs.id > maxrev:
break
id = b"%d" % cs.id
cs.author = self.recode(cs.author)
self.lastbranch[cs.branch] = id
cs.comment = self.recode(cs.comment)
if self.ui.configbool(b'convert', b'localtimezone'):
cs.date = makedatetimestamp(cs.date[0])
date = dateutil.datestr(cs.date, b'%Y-%m-%d %H:%M:%S %1%2')
self.tags.update(dict.fromkeys(cs.tags, id))
files = {}
for f in cs.entries:
files[f.file] = b"%s%s" % (
b'.'.join([(b"%d" % x) for x in f.revision]),
[b'', b'(DEAD)'][f.dead],
)
# add current commit to set
c = commit(
author=cs.author,
date=date,
parents=[(b"%d" % p.id) for p in cs.parents],
desc=cs.comment,
branch=cs.branch or b'',
)
self.changeset[id] = c
self.files[id] = files
self.heads = self.lastbranch.values()
finally:
os.chdir(d)
def _connect(self):
root = self.cvsroot
conntype = None
user, host = None, None
cmd = [b'cvs', b'server']
self.ui.status(_(b"connecting to %s\n") % root)
if root.startswith(b":pserver:"):
root = root[9:]
m = re.match(
r'(?:(.*?)(?::(.*?))?@)?([^:\/]*)(?::(\d*))?(.*)', root
)
if m:
conntype = b"pserver"
user, passw, serv, port, root = m.groups()
if not user:
user = b"anonymous"
if not port:
port = 2401
else:
port = int(port)
format0 = b":pserver:%s@%s:%s" % (user, serv, root)
format1 = b":pserver:%s@%s:%d%s" % (user, serv, port, root)
if not passw:
passw = b"A"
cvspass = os.path.expanduser(b"~/.cvspass")
try:
pf = open(cvspass, b'rb')
for line in pf.read().splitlines():
part1, part2 = line.split(b' ', 1)
# /1 :pserver:user@example.com:2401/cvsroot/foo
# Ah<Z
if part1 == b'/1':
part1, part2 = part2.split(b' ', 1)
format = format1
# :pserver:user@example.com:/cvsroot/foo Ah<Z
else:
format = format0
if part1 == format:
passw = part2
break
pf.close()
except IOError as inst:
if inst.errno != errno.ENOENT:
if not getattr(inst, 'filename', None):
inst.filename = cvspass
raise
sck = socket.socket()
sck.connect((serv, port))
sck.send(
b"\n".join(
[
b"BEGIN AUTH REQUEST",
root,
user,
passw,
b"END AUTH REQUEST",
b"",
]
)
)
if sck.recv(128) != b"I LOVE YOU\n":
raise error.Abort(_(b"CVS pserver authentication failed"))
self.writep = self.readp = sck.makefile(b'r+')
if not conntype and root.startswith(b":local:"):
conntype = b"local"
root = root[7:]
if not conntype:
# :ext:user@host/home/user/path/to/cvsroot
if root.startswith(b":ext:"):
root = root[5:]
m = re.match(br'(?:([^@:/]+)@)?([^:/]+):?(.*)', root)
# Do not take Windows path "c:\foo\bar" for a connection strings
if os.path.isdir(root) or not m:
conntype = b"local"
else:
conntype = b"rsh"
user, host, root = m.group(1), m.group(2), m.group(3)
if conntype != b"pserver":
if conntype == b"rsh":
rsh = encoding.environ.get(b"CVS_RSH") or b"ssh"
if user:
cmd = [rsh, b'-l', user, host] + cmd
else:
cmd = [rsh, host] + cmd
# popen2 does not support argument lists under Windows
cmd = [procutil.shellquote(arg) for arg in cmd]
cmd = procutil.quotecommand(b' '.join(cmd))
self.writep, self.readp = procutil.popen2(cmd)
self.realroot = root
self.writep.write(b"Root %s\n" % root)
self.writep.write(
b"Valid-responses ok error Valid-requests Mode"
b" M Mbinary E Checked-in Created Updated"
b" Merged Removed\n"
)
self.writep.write(b"valid-requests\n")
self.writep.flush()
r = self.readp.readline()
if not r.startswith(b"Valid-requests"):
raise error.Abort(
_(
b'unexpected response from CVS server '
b'(expected "Valid-requests", but got %r)'
)
% r
)
if b"UseUnchanged" in r:
self.writep.write(b"UseUnchanged\n")
self.writep.flush()
self.readp.readline()
def getheads(self):
self._parse()
return self.heads
def getfile(self, name, rev):
def chunkedread(fp, count):
# file-objects returned by socket.makefile() do not handle
# large read() requests very well.
chunksize = 65536
output = stringio()
while count > 0:
data = fp.read(min(count, chunksize))
if not data:
raise error.Abort(
_(b"%d bytes missing from remote file") % count
)
count -= len(data)
output.write(data)
return output.getvalue()
self._parse()
if rev.endswith(b"(DEAD)"):
return None, None
args = (b"-N -P -kk -r %s --" % rev).split()
args.append(self.cvsrepo + b'/' + name)
for x in args:
self.writep.write(b"Argument %s\n" % x)
self.writep.write(b"Directory .\n%s\nco\n" % self.realroot)
self.writep.flush()
data = b""
mode = None
while True:
line = self.readp.readline()
if line.startswith(b"Created ") or line.startswith(b"Updated "):
self.readp.readline() # path
self.readp.readline() # entries
mode = self.readp.readline()[:-1]
count = int(self.readp.readline()[:-1])
data = chunkedread(self.readp, count)
elif line.startswith(b" "):
data += line[1:]
elif line.startswith(b"M "):
pass
elif line.startswith(b"Mbinary "):
count = int(self.readp.readline()[:-1])
data = chunkedread(self.readp, count)
else:
if line == b"ok\n":
if mode is None:
raise error.Abort(_(b'malformed response from CVS'))
return (data, b"x" in mode and b"x" or b"")
elif line.startswith(b"E "):
self.ui.warn(_(b"cvs server: %s\n") % line[2:])
elif line.startswith(b"Remove"):
self.readp.readline()
else:
raise error.Abort(_(b"unknown CVS response: %s") % line)
def getchanges(self, rev, full):
if full:
raise error.Abort(_(b"convert from cvs does not support --full"))
self._parse()
return sorted(pycompat.iteritems(self.files[rev])), {}, set()
def getcommit(self, rev):
self._parse()
return self.changeset[rev]
def gettags(self):
self._parse()
return self.tags
def getchangedfiles(self, rev, i):
self._parse()
return sorted(self.files[rev])