How can I capture return value with Python timeit module? Question: Im running several machine learning algorithms with sklearn in a for loop and want to see how long each of them takes. The problem is I also need to return a value and DONT want to have to run it more than once because …
Why is it slower to iterate over a small string than a small list? Question: I was playing around with timeit and noticed that doing a simple list comprehension over a small string took longer than doing the same operation on a list of small single character strings. Any explanation? It’s almost 1.35 times as …
Why is if True slower than if 1? Question: Why is if True slower than if 1 in Python? Shouldn’t if True be faster than if 1? I was trying to learn the timeit module. Starting with the basics, I tried these: >>> def test1(): … if True: … return 1 … else: … return …
List comprehension vs generator expression's weird timeit results? Question: I was answering this question, I preferred generator expression here and used this, which I thought would be faster as generator doesn’t need to create the whole list first: >>> lis=[[‘a’,’b’,’c’],[‘d’,’e’,’f’]] >>> ‘d’ in (y for x in lis for y in x) True And Levon …
Measure website load time with Python requests Question: I’m trying to build a tool for testing the delay of my internet connection, more specifically web site load times. I thought of using the python requests module for the loading part. Problem is, it’s got no built-in functionality to measure the time it took to get …
Inconsistency between %time and %timeit in IPython Question: I am confronted to a weird situation that I can’t explain. Here is my test timing the generation of a large list of tuples: In [1]: def get_list_of_tuples(): …: return [(i,) for i in range(10**6)] …: In [2]: %time res = get_list_of_tuples() CPU times: user 0.93 s, …
How to use timeit module Question: How do I use timeit to compare the performance of my own functions such as "insertion_sort" and "tim_sort"? Asked By: Neemaximo || Source Answers: I find the easiest way to use timeit is from the command line. Given test.py: def insertion_sort(): … def timsort(): … run timeit like this: …
Creating an empty list in Python Question: What is the best way to create a new empty list in Python? l = [] or l = list() I am asking this because of two reasons: Technical reasons, as to which is faster. (creating a class causes overhead?) Code readability – which one is the standard …
How can I time a code segment for testing performance with Pythons timeit? Question: I’ve a python script which works just as it should, but I need to write the execution time. I’ve googled that I should use timeit but I can’t seem to get it to work. My Python script looks like this: import …
accurately measure time python function takes Question: I need to measure the time certain parts of my program take (not for debugging but as a feature in the output). Accuracy is important because the total time will be a fraction of a second. I was going to use the time module when I came across …
