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Questions tagged [timeit]

A Python built-in module for measuring execution time of small code snippets.

A Python built-in module for measuring execution time of small code snippets. It provides a Timer class which can be used to measure execution times.

According to the documentation, it "avoids a number of common traps for measuring execution times".

Documentation: https://docs.python.org/3/library/timeit.html

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why does python timeit module gives different time?

I am trying to understand timeit module for PYTHON. I have a very simple function, it just prints "hi" I then used timeit module to print the time elapsed for this function, but there is one output "0.0010001659393310547" other than "0.0" Why does…
LinconFive
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Interpreting Hamming Distance speed in python

I've been working on making my python more pythonic and toying with runtimes of short snippets of code. My goal to improve the readability, but additionally, to speed execution. This example conflicts with the best practices I've been reading…
Scrocco
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Cannot install timeit with pip. How can I fix this?

I'm trying to install timeit but this is what I get: $ sudo pip install timeit Downloading/unpacking timeit Could not find any downloads that satisfy the requirement timeit No distributions at all found for timeit Storing complete log in…
arianna p
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Timeit module in python does not run correctly

I am trying to use the timeit module for python and it appears as if there's an error in the timeit source code (though this doesn't seem right). Here's the snippet of the code being run: def recordCuckoo(amtElements, loadFactor): ''' …
newalchemy
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How to use timeit where each test requires random setup

I have a function f(x) that takes as input a list x of 100 random floats between 0 and 1. Different lists will result in different running times of f. I want to find out how long f takes to run on average, over a large number of different random…
Flash
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Timing difference on using timeit from interpreter and commandline

From interpreter, I get: >>> timeit.repeat("-".join( str(n) for n in range(10000) ) , repeat = 3, number=10000) [1.2294530868530273, 1.2298660278320312, 1.2300069332122803] # this is seconds From commandline, I get: $ python -m timeit -n 10000…
Ankur Agarwal
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What code does Python's timeit(...) method actually time in this bit of code?

timeit.timeit("A0([randint(1,256) * (-1) ** randint(1,2) for j in range("+str(n)+")])", setup="from HW2 import A0", number=1000000) I want to measure the time that the A0 algorithm takes to complete its job on a list of size n, but I can't find a…
user1707505
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Comparing numba njit/vectorize/guvectorize

I have been testing the following block for numba speed up: import numpy as np import timeit from numba import njit import numba @numba.guvectorize(["void(float64[:],float64[:],float64[:],float64, float64, float64[:])"], …
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timeit.timeit returning time in scientific notation?

I am using the timeit.timeit function to time one of my own functions, but the time returned is in scientific notation. import timeit def func(): ... print(timeit.timeit(stmt="func()", setup="from __main__ import func",…
Have a nice day
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Get the elapsed time of the execution

I am new in Python and I am trying to get the elapsed time of the execution.I want to print the start time end time and elapsed time. But it's not working as I wish. Here's a program that contains an option menu and I want to print the time of…
Arsaa
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IPython %timeit magic - changing output from "mean & std" to "best of 3"

I am using an IPython 6.2.1 integration with Eclipse/PyDev on Ubuntu. Python version is 3.5.2. I often see people timing a script like >>>%timeit for _ in range(1000): True 10000 loops, best of 3: 37.8 µs per loop When I perform the same…
Mr. T
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Time multiple python3 scripts

In the future I'll write multiple small scripts in Python 3 which I want to time. One way would be to write every script like this: # functions definitions go here if __name__ == '__main__': import time start = time.time() # my code end =…
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Dict efficiency measured with timeit returns two values instead of one

I'm testing defaultdict() vs dict.setdefault() efficiency using timeit. For some reason, execution of timeit returns two values; from collections import defaultdict from timeit import timeit dd = defaultdict(list) ds = {} def dset(): for i in…
Chen A.
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Timing R Chunk in R MarkDown/Notebook (Equivalent of %%timeit in python)

I am looking for an elegant way of timing execution of R chunk preferably running the chunk multiple times automatically in background. (Magic function %%timeit in Python notebook does exactly that) I know there are several ways of timing an R…
PagMax
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Why does creating a list from a generator object take so long?

I was interested in when I should use a generator in a function, and when I should just use a list, so I did some tests with filter and list comprehensions. >>> timeit.timeit('list(filter(lambda x: x%10, range(10)))') 3.281250655069016 >>>…
Peter Wang
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