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# This is an implementation of timeit module, as a practice

import itertools

import gc

_template = """

def run_timer(it, _timer):

%s

_start = _timer.time()

for _i in it:

%s

_end = _timer.time()

return _end - _start

"""

def get_runner(f, _setup):

def run_timer(it, _timer):

_setup()

_start = _timer.time()

for _i in it:

f()

_end = _timer.time()

return _end - _start

return run_timer

class Timer(object):

def __init__(self, target="pass", setup="pass"):

self._target = target

self._setup = setup

ns = {}

if isinstance(target, basestring):

if isinstance(setup, basestring):

src = _template%(setup, target)

elif callable(setup):

src = _template%("_setup()", target)

ns["_setup"] = setup

else:

raise ValueError("Needs a callable or python statement")

# print src

code = compile(src, "_dummy_", "exec")

exec code in globals(), ns

self.runner = ns['run_timer']

elif callable(target):

if isinstance(setup, basestring):

def temp():

exec setup in globals(), ns

self.runner = get_runner(target, temp)

elif callable(setup):

self.runner = get_runner(target, setup)

else:

raise ValueError("target must be statement for callable")

def timeit(self, times):

import time

it = itertools.repeat(None, times)

gc_on = gc.isenabled()

gc.disable()

try:

duration = self.runner(it, time)

finally:

if gc_on:

gc.enable()

return duration

def repeat(self, cycles, times):

t = []

for i in xrange(cycles):

tt = self.timeit(times)

t.append(tt)

return t

def timeit(target, setup, times):

timer = Timer(target, setup)

return timer.timeit(times)

def repeat(target, setup, times, cycles):

timer = Timer(target, setup)

return timer.repeat(cycles, times)

def main():

stmt1 = "a = 2+4"

stmt2 = "test(1)"

setup2 = "test = lambda x:x*2"

def test_func():

global x

x = x*2

timer = Timer(stmt1)

print stmt1, timer.timeit(100000)

timer = Timer(stmt2, setup2)

print stmt2, timer.timeit(10000)

timer = Timer(test_func, "global x;x=1")

print "func1", timer.timeit(10000)

print "func2", timeit("i,j=m, n", "m=1;n=2", 10000)

if __name__=="__main__":

main()