- cProfile: use this built-in tool to understand which functions in your code take the longest to run.
The
-s cumulative flag tells cProfile to sort by cumulative time spent inside each function; this gives us a view into the slowest parts of a section of code.
python3 -m cProfile -s cumulative ./src/pnk/__main__.py -i < src/tests/one.txt
18798 function calls (18223 primitive calls) in 0.016 seconds
ncalls tottime percall cumtime percall filename:lineno(function)
1 0.000 0.000 0.001 0.001 core.py:81(run)
...
- A timing decorator: use these techniques to understand the behavior of statements and functions.
@timefn
def run():
pass
@timefn: run took 0.0010941028594970703 seconds