python不同开根号速度对比

import time
import math
import numpy as np def timeit1():
s = time.time()
for i in range(750000):
z=i**.5
print ("Took %f seconds" % (time.time() - s)) def timeit2(arg=math.sqrt):
s = time.time()
for i in range(750000):
z=arg(i)
print ("Took %f seconds" % (time.time() - s)) def timeit3(arg=np.sqrt):
s = time.time()
for i in range(750000):
z=arg(i)
print ("Took %f seconds" % (time.time() - s)) def timeit4():
s = time.time()
for i in range(750000):
z=math.pow(i,.5)
print ("Took %f seconds" % (time.time() - s)) timeit1()
timeit2()
timeit3()
timeit4()

Took 0.152364 seconds

Took 0.061580 seconds

Took 1.016529 seconds

Took 0.215403 seconds

上一篇:10、jstl标签库


下一篇:C语言博客作业--函数嵌套调用