python 测试代码执行速度 简单代码

import time

rpes = 10000
repsList = range(rpes)


def timer(func, *args, **kargs):
    start = time.clock()
    for i in repsList:
        ret = func(*args, **kargs)
    elapsed = time.clock() - start
    return elapsed, ret


def forLoop():
    res = []
    for x in repsList:
        res.append(abs(x))
    return res


def listComp():
    return [abs(x) for x in repsList]


def mapCall():
    return list(map(abs, repsList))


def genExpr():
    return list(abs(x) for x in repsList)


def genFunc():
    def gen():
        for x in repsList:
            yield abs(x)

    return list(gen())


print(sys.version)
for test in (forLoop, listComp, mapCall, genExpr, genFunc):
    elapsed, result = timer(test)
    print('-' * 33)
    print('{0} : {1:.4f} => [{2}....{3}]'.format(test.__name__, elapsed, result[0], result[-1]))