Mercurial > hg
view mercurial/txnutil.py @ 46776:471cd86c8eb4
bundle: optional multithreaded compression, ATM zstd-only
Compression type can be a huge chunk of "hg bundle", especially when
using the higher compression levels. With level=22 and threads=7, the
NetBSD test repository took 28:39 wall time and 157:47 user time.
Before, level=22 would take 129:20 wall time and 129:07 user time.
Differential Revision: https://phab.mercurial-scm.org/D9283
author | Joerg Sonnenberger <joerg@bec.de> |
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date | Sun, 08 Nov 2020 20:17:09 +0100 |
parents | 89a2afe31e82 |
children | 6000f5b25c9b |
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# txnutil.py - transaction related utilities # # Copyright FUJIWARA Katsunori <foozy@lares.dti.ne.jp> 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 from . import encoding def mayhavepending(root): """return whether 'root' may have pending changes, which are visible to this process. """ return root == encoding.environ.get(b'HG_PENDING') def trypending(root, vfs, filename, **kwargs): """Open file to be read according to HG_PENDING environment variable This opens '.pending' of specified 'filename' only when HG_PENDING is equal to 'root'. This returns '(fp, is_pending_opened)' tuple. """ if mayhavepending(root): try: return (vfs(b'%s.pending' % filename, **kwargs), True) except IOError as inst: if inst.errno != errno.ENOENT: raise return (vfs(filename, **kwargs), False)