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