Mercurial > hg
view mercurial/scmposix.py @ 50317:af776c3d5c3e stable
debugdeltachain: stop summing the same chain over and over
Before this patch, delta chain size was computed from scratch for each chain,
disregarding the fact very likely already computed the same of length-1 prefix
for another revisions.
We not cache delta chain size and shortcut the computation when we see them.
Just for my mercurial-devel clone, this move the computation from about 17.5
second to about 4.8 seconds.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Tue, 21 Mar 2023 15:44:38 +0000 |
parents | 7a4143428db7 |
children | 18c8c18993f0 |
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import array import errno import fcntl import os import sys from typing import ( List, Tuple, ) from .pycompat import getattr from . import ( encoding, pycompat, util, ) if pycompat.TYPE_CHECKING: from . import ui as uimod # BSD 'more' escapes ANSI color sequences by default. This can be disabled by # $MORE variable, but there's no compatible option with Linux 'more'. Given # OS X is widely used and most modern Unix systems would have 'less', setting # 'less' as the default seems reasonable. fallbackpager = b'less' def _rcfiles(path: bytes) -> List[bytes]: rcs = [os.path.join(path, b'hgrc')] rcdir = os.path.join(path, b'hgrc.d') try: rcs.extend( [ os.path.join(rcdir, f) for f, kind in sorted(util.listdir(rcdir)) if f.endswith(b".rc") ] ) except OSError: pass return rcs def systemrcpath() -> List[bytes]: path = [] if pycompat.sysplatform == b'plan9': root = b'lib/mercurial' else: root = b'etc/mercurial' # old mod_python does not set sys.argv if len(getattr(sys, 'argv', [])) > 0: p = os.path.dirname(os.path.dirname(pycompat.sysargv[0])) if p != b'/': path.extend(_rcfiles(os.path.join(p, root))) path.extend(_rcfiles(b'/' + root)) return path def userrcpath() -> List[bytes]: if pycompat.sysplatform == b'plan9': return [encoding.environ[b'home'] + b'/lib/hgrc'] elif pycompat.isdarwin: return [os.path.expanduser(b'~/.hgrc')] else: confighome = encoding.environ.get(b'XDG_CONFIG_HOME') if confighome is None or not os.path.isabs(confighome): confighome = os.path.expanduser(b'~/.config') return [ os.path.expanduser(b'~/.hgrc'), os.path.join(confighome, b'hg', b'hgrc'), ] def termsize(ui: "uimod.ui") -> Tuple[int, int]: try: import termios TIOCGWINSZ = termios.TIOCGWINSZ # unavailable on IRIX (issue3449) except (AttributeError, ImportError): return 80, 24 for dev in (ui.ferr, ui.fout, ui.fin): try: try: fd = dev.fileno() except AttributeError: continue if not os.isatty(fd): continue arri = fcntl.ioctl(fd, TIOCGWINSZ, b'\0' * 8) height, width = array.array('h', arri)[:2] if width > 0 and height > 0: return width, height except ValueError: pass except IOError as e: if e.errno == errno.EINVAL: pass else: raise return 80, 24