Hi Pythonistas, Today we are going to analyze the performance of the difference of C-style for loop vs Pythonic for loop
Let's consider the example
The c style for loop
data = ["a", "b", "c", "d", "e", "f"] def loop_using_cstyle(): for index in range(len(data)): item = data[index] a = item + "test"
Pythonic loop style
def using_pythonic_for_loop(): for item in data: a = item + "test"
Analysis using the timeit module
time_taken = timeit.timeit(loop_using_cstyle, number=1000_000) print("Time taken by c-style for loop: ", time_taken) time_taken = timeit.timeit(using_pythonic_for_loop, number=1000_000) print("Time taken by pythonic for loop: ", time_taken)
Time taken by c-style for loop: 0.4804183149972232 Time taken by pythonic for loop: 0.2922558329992171
If we analyze the code we can see an additional step for accessing the nth index of the array. But in a pythonic way, there is no additional access to the element using index so it becomes faster
For iterating over an iterable always use the pythonic way of for loop which is faster and the code looks more pythonic
Hope you have learned something from this post. Please share your suggestion with firstname.lastname@example.org