profiling

Is there a Python library that shows execution time per line?

Is there a Python library that shows execution time per line? Question: I have found this library called heartrate which shows how many times each line has been hit. I’m wondering if there is a similar library that can show the execution time of each line? Sometimes a single line can be a bottleneck of …

Total answers: 2

As of 2023, is there any way to line profile Cython at all?

As of 2023, is there any way to line profile Cython at all? Question: Something has substantially changed with the way that line profiling Cython works, such that previous answers no longer work. I am not sure if something subtle has changed, or if it is simply totally broken. For instance, here is a very …

Total answers: 1

pydrake: How do I identify slow Python LeafSystem's (to possibly rewrite in C++)?

pydrake: How do I identify slow Python LeafSystem's (to possibly rewrite in C++)? Question: I am prototyping a simple Drake simulation. I have some simple Python LeafSystems that implement controllers, and find that without these systems, my simulation can run at realtime; however, with these systems, my simulation runs much slower than realtime. I don’t …

Total answers: 2

Python – Sort profile report by tottime

Python – Sort profile report by tottime Question: Python includes a simple to use profiler: >> import cProfile >> import re >> cProfile.run(‘re.compile("foo|bar")’) 197 function calls (192 primitive calls) in 0.002 seconds Ordered by: standard name ncalls tottime percall cumtime percall filename:lineno(function) 1 0.000 0.000 0.001 0.001 <string>:1(<module>) 1 0.000 0.000 0.001 0.001 re.py:212(compile) … …

Total answers: 2

pyroscope: how to use py-spy configs in pyroscope python client

pyroscope: how to use py-spy configs in pyroscope python client Question: I have recently used Pyroscope for my python program. It uses py-spy for profiling the programs. I have checked the configuration of the Pyroscope python client, and the configs are very limited which described in the configure method. I want to use some of …

Total answers: 1

saving cProfile results to readable external file

saving cProfile results to readable external file Question: I am using cProfile try to profile my codes: pr = cProfile.Profile() pr.enable() my_func() # the code I want to profile pr.disable() pr.print_stats() However, the results are too long and cannot be fully displayed in the Spyder terminal (the function calls which take the longest time to …

Total answers: 5

How do I find out what parts of my code are inefficient in Python

How do I find out what parts of my code are inefficient in Python Question: On a previous question I was asking about multiprocessing, using multiple cores to make a program run faster, and someone told me this: More often than not, you can get a 100x+ optimization with better code compared to a 4x …

Total answers: 2

Pandas: How to store cProfile output in a pandas DataFrame?

Pandas: How to store cProfile output in a pandas DataFrame? Question: There already exist some posts discussing python profiling using cProfile, as well as the challenges of analyzing the output due to the fact that the output file restats from the sample code below is not a plain text file. The snippet below is only …

Total answers: 7

How to profile cython functions line-by-line

How to profile cython functions line-by-line Question: I often struggle to find bottlenecks in my cython code. How can I profile cython functions line-by-line? Asked By: Till Hoffmann || Source Answers: Robert Bradshaw helped me to get Robert Kern’s line_profiler tool working for cdef functions and I thought I’d share the results on stackoverflow. In …

Total answers: 3

How to profile a Jinja2 template?

How to profile a Jinja2 template? Question: The Flask app I am profiling spends a long time rendering its Jinja2 templates. I have installed flask lineprofilerpanel which is interesting but unfortunately does not let me drill down into the template rendering to see where all the time is spent. What is the best way to …

Total answers: 3