How do I get time of a Python program's execution?


To measure time time of a program's execution, either use time.clock() or time.time() functions. The python docs state that this function should be used for benchmarking purposes. 

Example

import time
t0= time.clock()
print("Hello")
t1 = time.clock() - t0
print("Time elapsed: ", t1 - t0) # CPU seconds elapsed (floating point)

Output

This will give the output −

Time elapsed:  0.0009403145040156798

You can also use the timeit module to get proper statistical analysis of a code snippet's execution time.  It runs the snippet multiple times and then it tells you how long the shortest run took. You can use it as follows −

Example

def f(x):
  return x * x
 
import timeit
timeit.repeat("for x in range(100): f(x)", "from __main__ import f", number=100000)

Output

This will give the output −

[2.0640320777893066, 2.0876040458679199, 2.0520210266113281]


Updated on: 12-Jun-2020

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