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
#!/usr/bin/env python
#
# An example FastCGI script for use with flup, edit as necessary
# Path to repo or hgweb config to serve (see 'hg help hgweb')
config = "/path/to/repo/or/config"
# Uncomment and adjust if Mercurial is not installed system-wide
# (consult "installed modules" path from 'hg debuginstall'):
#import sys; sys.path.insert(0, "/path/to/python/lib")
# Uncomment to send python tracebacks to the browser if an error occurs:
#import cgitb; cgitb.enable()
from mercurial import demandimport; demandimport.enable()
from mercurial.hgweb import hgweb
from flup.server.fcgi import WSGIServer
application = hgweb(config)
WSGIServer(application).run()