Jupyter Notebook | Magic-Timing运行时间

  比起稍微麻烦的import time strat_time end_time，jupyter notebook自带magic函数，非常良心了 :)

%%time

  运行一次cell的代码花费的时间

%%time
j=0
for i in range(10000):
    j=i*(2^i)

Wall time: 2.03 ms

%time

  运行一次当前行所花费的时间

import numpy as np
%time j=np.eye(100)*np.eye(100)

Wall time: 2.99 ms

%timeit

  执行一行语句100，000次(默认情况下)，然后给出运行最快3次的平均值

import numpy as np
%timeit j=np.eye(100)*np.eye(100)

21 µs ± 406 ns per loop (mean ± std. dev. of 7 runs, 10000 loops each)