treemanifest: add an optimized __nonzero__()
We use bool(manifest) in at least some places:
localrepo.py:1730
hgweb/webcommands.py:524
Since the treemanifest class doesn't define __nonzero__() (before this
patch), bool(manifest) will instead call __len__(), which can be slow
for treemanifests. This patch may make a noticeable difference in the
localrepo case above, but that only happens when committing a merge
and I haven't timed it.
Note that Durham already added a __nonzero__ implementation to
manifestdict in b19291e5d506 (manifest: add __nonzero__ method,
2016-11-03).
Differential Revision: https://phab.mercurial-scm.org/D2232
cHg
===
A fast client for Mercurial command server running on Unix.
Install:
$ make
$ make install
Usage:
$ chg help # show help of Mercurial
$ alias hg=chg # replace hg command
$ chg --kill-chg-daemon # terminate background server
Environment variables:
Although cHg tries to update environment variables, some of them cannot be
changed after spawning the server. The following variables are specially
handled:
* configuration files are reloaded automatically by default.
* CHGHG or HG specifies the path to the hg executable spawned as the
background command server.
The following variables are available for testing:
* CHGDEBUG enables debug messages.
* CHGSOCKNAME specifies the socket path of the background cmdserver.
* CHGTIMEOUT specifies how many seconds chg will wait before giving up
connecting to a cmdserver. If it is 0, chg will wait forever. Default: 60