Mercurial > hg
view tests/test-demandimport.py @ 31397:8f5ed8fa39f8
perf: perform a garbage collection before each iteration
Currently, no explicit garbage collection is performed when running
the microbenchmarks in `hg perf`. I think this is wrong because
garbage collection can have a significant impact on execution times.
And, if gc is triggered via the default heuristics, it will
fire effectively randomly during subsequent benchmark iterations
due to variable amount of garbage left over from previous runs.
Running a gc before invoking the measured function will help ensure
state is more consistent across all iterations.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Mon, 13 Mar 2017 18:16:42 -0700 |
parents | 1914db1b7d9e |
children | 252d2260c74e |
line wrap: on
line source
from __future__ import print_function from mercurial import demandimport demandimport.enable() import os import subprocess import sys # Only run if demandimport is allowed if subprocess.call(['python', '%s/hghave' % os.environ['TESTDIR'], 'demandimport']): sys.exit(80) if os.name != 'nt': try: import distutils.msvc9compiler print('distutils.msvc9compiler needs to be an immediate ' 'importerror on non-windows platforms') distutils.msvc9compiler except ImportError: pass import re rsub = re.sub def f(obj): l = repr(obj) l = rsub("0x[0-9a-fA-F]+", "0x?", l) l = rsub("from '.*'", "from '?'", l) l = rsub("'<[a-z]*>'", "'<whatever>'", l) return l import os print("os =", f(os)) print("os.system =", f(os.system)) print("os =", f(os)) from mercurial import util print("util =", f(util)) print("util.system =", f(util.system)) print("util =", f(util)) print("util.system =", f(util.system)) from mercurial import hgweb print("hgweb =", f(hgweb)) print("hgweb_mod =", f(hgweb.hgweb_mod)) print("hgweb =", f(hgweb)) import re as fred print("fred =", f(fred)) import sys as re print("re =", f(re)) print("fred =", f(fred)) print("fred.sub =", f(fred.sub)) print("fred =", f(fred)) print("re =", f(re)) print("re.stderr =", f(re.stderr)) print("re =", f(re)) import contextlib print("contextlib =", f(contextlib)) try: from contextlib import unknownattr print('no demandmod should be created for attribute of non-package ' 'module:\ncontextlib.unknownattr =', f(unknownattr)) except ImportError as inst: print('contextlib.unknownattr = ImportError: %s' % rsub(r"'", '', str(inst))) # Unlike the import statement, __import__() function should not raise # ImportError even if fromlist has an unknown item # (see Python/import.c:import_module_level() and ensure_fromlist()) contextlibimp = __import__('contextlib', globals(), locals(), ['unknownattr']) print("__import__('contextlib', ..., ['unknownattr']) =", f(contextlibimp)) print("hasattr(contextlibimp, 'unknownattr') =", util.safehasattr(contextlibimp, 'unknownattr')) demandimport.disable() os.environ['HGDEMANDIMPORT'] = 'disable' # this enable call should not actually enable demandimport! demandimport.enable() from mercurial import node print("node =", f(node))