Mercurial > hg
view hg @ 43044:f9d35f01b8b3
setup: build extensions in parallel by default
The build_ext distutils command in Python 3.5+ has a "parallel"
option that controls whether to build extensions in parallel. It
is disabled by default (None) and can be set to an integer value
for number of cores or True to indicate use all available CPU
cores.
This commit changes our build_ext command override to set
"parallel" to True unless a value has been provided by the caller.
On my machine, this makes `python setup.py build_ext` 1-4s faster.
It is worth noting that at this time, each individual source file
constituting the extension is still built serially. For Mercurial,
this means that we can't build faster than the slowest-to-build
extension, which is the zstd extension by a long shot. This means
that setup.py is still not very efficient at utilizing multiple
cores. But we're better than before.
Differential Revision: https://phab.mercurial-scm.org/D6923
# no-check-commit because of foo_bar naming
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Mon, 30 Sep 2019 17:26:41 -0700 |
parents | 5e78c100a215 |
children | 5c9c71cde1c9 |
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#!/usr/bin/env python # # mercurial - scalable distributed SCM # # Copyright 2005-2007 Matt Mackall <mpm@selenic.com> # # 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 os import sys if os.environ.get('HGUNICODEPEDANTRY', False): try: reload(sys) sys.setdefaultencoding("undefined") except NameError: pass libdir = '@LIBDIR@' if libdir != '@' 'LIBDIR' '@': if not os.path.isabs(libdir): libdir = os.path.join(os.path.dirname(os.path.realpath(__file__)), libdir) libdir = os.path.abspath(libdir) sys.path.insert(0, libdir) from hgdemandimport import tracing with tracing.log('hg script'): # enable importing on demand to reduce startup time try: if sys.version_info[0] < 3 or sys.version_info >= (3, 6): import hgdemandimport; hgdemandimport.enable() except ImportError: sys.stderr.write("abort: couldn't find mercurial libraries in [%s]\n" % ' '.join(sys.path)) sys.stderr.write("(check your install and PYTHONPATH)\n") sys.exit(-1) from mercurial import dispatch dispatch.run()