mirror of https://github.com/python/cpython
83 lines
2.5 KiB
Python
83 lines
2.5 KiB
Python
from . import util
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from .source import util as source_util
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import gc
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import decimal
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import imp
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import importlib
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import sys
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import timeit
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def bench_cache(import_, repeat, number):
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"""Measure the time it takes to pull from sys.modules."""
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name = '<benchmark import>'
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with util.uncache(name):
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module = imp.new_module(name)
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sys.modules[name] = module
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runs = []
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for x in range(repeat):
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start_time = timeit.default_timer()
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for y in range(number):
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import_(name)
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end_time = timeit.default_timer()
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runs.append(end_time - start_time)
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return min(runs)
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def bench_importing_source(import_, repeat, number, loc=100000):
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"""Measure importing source from disk.
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For worst-case scenario, the line endings are \\r\\n and thus require
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universal newline translation.
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"""
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name = '__benchmark'
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with source_util.create_modules(name) as mapping:
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with open(mapping[name], 'w') as file:
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for x in range(loc):
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file.write("{0}\r\n".format(x))
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with util.import_state(path=[mapping['.root']]):
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runs = []
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for x in range(repeat):
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start_time = timeit.default_timer()
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for y in range(number):
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try:
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import_(name)
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finally:
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del sys.modules[name]
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end_time = timeit.default_timer()
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runs.append(end_time - start_time)
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return min(runs)
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def main(import_):
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args = [('sys.modules', bench_cache, 5, 500000),
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('source', bench_importing_source, 5, 10000)]
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test_msg = "{test}, {number} times (best of {repeat}):"
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result_msg = "{result:.2f} secs"
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gc.disable()
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try:
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for name, meth, repeat, number in args:
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result = meth(import_, repeat, number)
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print(test_msg.format(test=name, repeat=repeat,
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number=number).ljust(40),
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result_msg.format(result=result).rjust(10))
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finally:
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gc.enable()
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if __name__ == '__main__':
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import optparse
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parser = optparse.OptionParser()
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parser.add_option('-b', '--builtin', dest='builtin', action='store_true',
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default=False, help="use the built-in __import__")
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options, args = parser.parse_args()
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if args:
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raise RuntimeError("unrecognized args: {0}".format(args))
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import_ = __import__
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if not options.builtin:
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import_ = importlib.__import__
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main(import_)
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