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view tests/hghave @ 31467:08ecec297521
bdiff: use Python memory allocator in fixws
Python has its own memory allocation APIs. For allocations
<= 512 bytes, it allocates memory from arenas. This means that
average small allocations don't call the system allocator, which
makes them faster. Also, arena allocations cut down on memory
fragmentation, which can matter for performance in long-running
processes.
Another advantage of using the Python memory allocator is that
allocations are tracked by Python. This is a bigger deal in
Python 3, as modern versions of Python have some decent built-in
tools for examining memory usage, leaks, etc.
This patch converts a trivial malloc() + free() in the bdiff code
to use the Python allocator APIs. Since the object being
operated on is a line, chances are it will use an arena. So,
this could have a net positive impact on performance (although
I didn't measure it).
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Thu, 09 Mar 2017 11:54:25 -0800 |
parents | b1b35a9051c3 |
children | 47ef023d0165 |
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#!/usr/bin/env python """Test the running system for features availability. Exit with zero if all features are there, non-zero otherwise. If a feature name is prefixed with "no-", the absence of feature is tested. """ from __future__ import absolute_import, print_function import hghave import optparse import os import sys checks = hghave.checks def list_features(): for name, feature in sorted(checks.items()): desc = feature[1] print(name + ':', desc) def test_features(): failed = 0 for name, feature in checks.items(): check, _ = feature try: check() except Exception as e: print("feature %s failed: %s" % (name, e)) failed += 1 return failed parser = optparse.OptionParser("%prog [options] [features]") parser.add_option("--test-features", action="store_true", help="test available features") parser.add_option("--list-features", action="store_true", help="list available features") def _loadaddon(): if 'TESTDIR' in os.environ: # loading from '.' isn't needed, because `hghave` should be # running at TESTTMP in this case path = os.environ['TESTDIR'] else: path = '.' if not os.path.exists(os.path.join(path, 'hghaveaddon.py')): return sys.path.insert(0, path) try: import hghaveaddon assert hghaveaddon # silence pyflakes except BaseException as inst: sys.stderr.write('failed to import hghaveaddon.py from %r: %s\n' % (path, inst)) sys.exit(2) sys.path.pop(0) if __name__ == '__main__': options, args = parser.parse_args() _loadaddon() if options.list_features: list_features() sys.exit(0) if options.test_features: sys.exit(test_features()) hghave.require(args)