gistfile1.py

import time

# decorator that measures execution time of a function.
def timing(func):
    def wrapper(*arg):
        t0 = time.time()
        r = func(*arg)
        elapsed = time.time() - t0
        print '%s => %0.3f ms' % (func.func_name, elapsed*1000.00)
        return r
    return wrapper

# decorator that measures the average execution time of a hundred function calls.
def timingx100(func):
    n = 1000
    def avg_wrapper(*arg):
        tot = 0
        emax = 0 # intmax
        emin = 0 # and intmin?
        for i in range(1, n):
            t0 = time.time()
            r = func(*arg)
            elapsed = time.time() - t0
            print '%s%s => %0.3f ms' % (func.func_name, arg, elapsed*1000.00)
            tot += elapsed
            if elapsed > emax or emax == 0:
                emax = elapsed
            if elapsed < emin or emin == 0:
                    emin = elapsed
        avg = tot / n
        print 'average> %s => %0.3f ms' % (func.func_name, avg*1000.00)
        print 'min: %0.3f ms  max: %0.3f ms' % (emin*1000.00, emax*1000.00)
        # TODO: stddev, etc
    return avg_wrapper

@timingx100
def f(xs=[]):
    sum = 0
    for x in xs:
        sum += x
    return sum

if __name__ == '__main__':
    f([4,8, 16]*1024)