Source: 📖 Python Cookbook ch14.13 p589

Profiling module runtime

You can profile a module for a detailed breakdown of how each function runs by using -m cProfile from the command line:

bash % python3 -m cProfile somemodule.py

This will give you the following metrics for each function:

• tottime: total time spent exclusively in the function.
• percall: the average per call of the above.
• cumtime: the cumulative time spent in the function, and in any functions that the function calls.
• percall: the average per call of the above.