定时功能时如何使用timeit [英] How to use timeit when timing a function

问题描述

首先让我说我对python几乎一无所知，但是必须用三种不同的语言(已经用Java和c ++完成)编写程序.

Let me start off by saying I know almost nothing about python but have to write a program in three different languages (already done in java and c++).

我需要能够对方法的执行进行一定次数的计时，然后打印整个执行时间所花费的时间.

I need to be able to time the execution of a method a certain number of times and then print the time it took for the over-all execution time.

即

我有函数A(这是performSearch(arrayTest)，其中arrayTest是已知大小的数组). A被执行10次

I have function A (which is performSearch(arrayTest) where arrayTest is an array of known size). A is executed 10 times

我需要确定从执行A到执行A之后所花费的时间.

I need to be able to time how long it took from before A was executed to after A was executed.

推荐答案

您可以阅读如何使用timeit

You can read how to use timeit here.

并假设您在同一个文件中有一个名为performSearch的函数，那么下面的运行timeit将起作用.

And assuming you have a function called performSearch in the same file that your running timeit from the following would work.

import timeit

def performSearch(array):
    array.sort()


arrayTest = ["X"]*1000

if __name__ == "__main__":
    print timeit.timeit("performSearch(arrayTest)","from __main__ import performSearch, arrayTest",number=10)

哪个返回:

0.000162031766607

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