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 :
Python3
# Code to Measure time taken by program to execute.import time# store starting timebegin = time.time()# program body startsfor i in range(5): print("GeeksForGeeks")# program body endstime.sleep(1)# store end timeend = time.time()# total time takenprint(f"Total runtime of the program is {end - begin}") |
Output
GeeksForGeeks GeeksForGeeks GeeksForGeeks GeeksForGeeks GeeksForGeeks Total runtime of the program is 1.0009586811065674
Time Complexity: O(1)
Auxiliary Space: O(1)
Approach #2 : Using Timeit module
Python3
# importing the required moduleimport timeit# code snippet to be executed only oncemysetup = "from math import sqrt"# code snippet whose execution time is to be measuredmycode = '''def example(): mylist = [] for x in range(100): mylist.append(sqrt(x))'''# timeit statementprint timeit.timeit(setup = mysetup, stmt = mycode, number = 10000) |
Output:
0.00119590759277
Approach #3 : Using default_timer() method in timeit module
Python3
import timeitstartTime = timeit.default_timer()for _ in range(100): statement = "GeeksForGeeks"endTime = timeit.default_timer()print(endTime - startTime) |
Output
1.2153992429375648e-05
Approach #4 : Using the datetime module
Python3
import datetimestartTime = datetime.datetime.now()for _ in range(1_00_00_000): statement = "GeeksForGeeks"endTime = datetime.datetime.now()print(endTime - startTime) |
Output
0:00:00.588817
Note: Output may vary depending on the system or server load. To read more about Timeit modulule, refer – Timeit in Python with Examples
