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Python – Measure time taken by program to execute
  • Difficulty Level : Easy
  • Last Updated : 26 May, 2020

This article aims to show how to measure the time taken by the program to execute. Calculating time helps to optimize your Python script to perform better.

Approach #1 :
A simple solution to it is to use time module to get the current time. The following steps calculate the running time of a program or section of a program.

  • Store the starting time before the first line of the program executes.
  • Store the ending time after the last line of the program executes.
  • Print the difference between start time and end time.

Code #1 :




# Code to Measure time taken by program to execute.
import time
  
# store starting time
begin = time.time()
  
# program body starts
  
for i in range(5):
    print("GeeksForGeeks")
# program body ends
  
time.sleep(1)
# store end time
end = time.time()
  
# total time taken
print(f"Total runtime of the program is {end - begin}")
Output:
GeeksForGeeks
GeeksForGeeks
GeeksForGeeks
GeeksForGeeks
GeeksForGeeks
Total runtime of the program is 1.0010437965393066

 
Approach #2 : Using Timeit module






# importing the required module 
import timeit 
  
# code snippet to be executed only once 
mysetup = "from math import sqrt"
  
# code snippet whose execution time is to be measured 
mycode = ''' 
def example(): 
    mylist = [] 
    for x in range(100): 
        mylist.append(sqrt(x)) 
'''
  
# timeit statement 
print timeit.timeit(setup = mysetup, 
                    stmt = mycode, 
                    number = 10000

Output:

0.00119590759277

Note: Output may vary depending on the system or server load.

To read more about Timeit modulule, refer – Timeit in Python with Examples

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To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course.

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