Questions tagged [cprofile]

cProfile is a built-in Python module that describes the run time performance of a program, providing a variety of statistics.

cProfile is a built-in module suitable for profiling Python programs. It's designed as a faster drop-in replacement for the profile implementation. cProfile is implemented as C-Extension which provides less overhead than the pure Python implementation of profile, but it may not be available in all Python implementations.

It can be used in a Python file:

import cProfile
cProfile.run('insert_your_code_to_profile_here')

But also from the command-line, to profile a script:

python -m cProfile [-o output_file] [-s sort_order] (-m module | myscript.py)

Sources:

230 questions
0
votes
0 answers

How to profile the maximum time a function takes in python (or a histogram of times)

I am building a ROS2 GUI. In this there is a function: rclpy.spin_once(qt_node, timeout_sec=0) This processes every ROS2 message that has been received since it was last called. If no messages have been received, it waits for timeout_sec and…
Blue7
  • 1,750
  • 4
  • 31
  • 55
0
votes
1 answer

cProfile, how to understand why lambda function is most time consuming call

I'm new to cprofile but I'm running it on a python tool written for ArcGIS. It tells me that the most time consuming function is the lambda function in…
0
votes
1 answer

Python cprofile total time

I am doing some profiling of my code, and trying to optimize it as much as I could. But I notice that the total cumulative time for a specific function doesnt add up sometimes. So I wasnt sure which function was being the culprit. To make this…
user1179317
  • 2,693
  • 3
  • 34
  • 62
0
votes
1 answer

What is the performance impact of Python profiling?

I am considering profiling a Python application in production (such as a Django website). I've found many options that self-describe as lightweight and demonstrate how they are used (including cProfile, vmprof, yappi and DTrace/SystemTap) but I am…
lofidevops
  • 15,528
  • 14
  • 79
  • 119
0
votes
0 answers

How to interpret python cProfile output

I am running cProfile on my python script in order to see where i can improve performance and using snakeviz to visualize. The results are pretty vague however; how do I interpret them? Here are the first few lines of it: Ordered by: internal…
0
votes
1 answer

Profiling Imports in Python

I have an existing library and I want to optimize the imports in order to improve load time. Using the cProfile it doesn't really show much. Is there a different profiler to examine the imports of a library? Thank you
JabberJabber
  • 341
  • 2
  • 17
0
votes
1 answer

How to see what is slowing your Python script down using snakeviz and cProfile

So you want to know why your Python script is running slow? There is an easy way to do this using cProfile and pstats, which count the number of calls to each function. We can visualize the results interactively in our web browser using…
Matthew Reid
  • 332
  • 2
  • 9
0
votes
1 answer

Python profile: How to get the time for each individual execution (no aggregation)

I am trying to debug a python based project that involves many repeated calls to the same set of functions. This code is part of an API. However, over time the execution time for these functions increases linearly. I now need to find out what is…
Cactus
  • 864
  • 1
  • 17
  • 44
0
votes
1 answer

cProfile for non terminating python program

I have a non terminating python program that I debug with import faulthandler faulthandler.dump_traceback_later(480,exit=True) call_very_complicated_python_code() I want to profile it to gain better understanding which parts are stuck: $ python -m…
OrenIshShalom
  • 5,974
  • 9
  • 37
  • 87
0
votes
1 answer

Creating a Python list from a map using dictionary get() as a function vs creating a dictionary get() list with a for loop

I was very surprised that a seemingly easier and less taxing function was less efficient. I ran a test on two methods, with a 10000 a-j (randomized) characters long string as word. The old function is a, the new one is b: def a(word): dictionary =…
Rysicin
  • 95
  • 1
  • 10
0
votes
0 answers

gprof is showing 0 computational time

I am trying to evaluate the computational time using gprof. I compiled my code using the following command and then ran it, worked fine. But while trying to evaluate, its showing 0 cpu time. a) gcc -pg -o process_basic process_basic.c b)…
Vivek Roy
  • 21
  • 1
0
votes
1 answer

Profiling for a program using python-eve server

I am running a backend python-eve server with multiple functions being called to provide one service. I want to do profiling for this python backend server. I want to find out which among the multiple functionalities is taking time for execution. I…
Eswar
  • 1,201
  • 19
  • 45
0
votes
1 answer

using cprofile with input files

I am supposed to run following command for an assignment to analyze the functions in rsa.py python -m cProfile -s time rsa.py < tests/1verdict32.in I am assuming this file uses tests/1verdict32.in as in the input file to rsa.py. but I am not…
0
votes
0 answers

Python profiling - recognize built-in hash function usages

I'm using cProfile library to do profiling on my python code. Currently, the most used function that I see in the process is: ncalls tottime percall cumtime percall filename:lineno(function) 4845420/1329718 2.528 0.000 3.739 0.000…
macro_controller
  • 1,469
  • 1
  • 14
  • 32
0
votes
2 answers

What does this Python cProfile output mean?

ncalls tottime percall cumtime percall filename:lineno(function) 1 0.000 0.000 65.417 65.417 :1() 1 43.675 43.675 65.417 65.417 primenumber_o.py:3(main) 1 0.000 0.000 0.000 0.000 {method…