timingtest.py

import contextlib
@contextlib.contextmanager
def timing(results=None):
    """
    Time the execution of the block of code. If a results list is
    passed in, the time is appended to the list. Also returns a list
    of one element containing the time the execution took.

    To use, do something like:

    from time import sleep
    results_list=[]
    with timing(results_list) as t:
        sleep(1)
    print results_list, t

    Exceptions in the code should be re-raised and the timing should
    correctly be set regardless of the exceptions.
    """
    from time import time
    try:
        # code in the context is executed when we yield
        start=[time()]
        yield start
    except:
        # any exceptions in the code should get propagated
        raise
    finally:
        start[0]=time()-start[0]
        if results is not None:
            results.extend(start) 

repeats = []
timings = []
for i in range(10):
    for j in range(1000):
        with timing(timings):
            fib(5)
    repeats.append(sum(timings))
print repeats