How long does each line in your Python program take to run?

Here are two super quick, user-friendly options (no code refactoring required + out-of-the-box pretty visualizations):

cProfile + SnakeViz

pip install snakeviz

python3 -m cProfile -o out.prof YOUR_PYTHON_PROGRAM.py
snakeviz out.prof

You can now visit localhost:8080 in your browser to view the line-by-line heatmap for your program:

Screen Shot 2022-12-12 at 2.52.48 AM

VizTracer

Note: This is better for programs with multiprocessing.

pip install viztracer

viztracer YOUR_PYTHON_PROGRAM.py

It will then print out the command that you need to run to view your program’s output.

It will look something like this:

Use the following command to open the report:
	vizviewer PATH_TO_YOUR_PYTHON_PROGRAM/result.json

Run that command, then visit localhost:9001 in your browser to view the line-by-line heatmap for your program:

Screen Shot 2022-12-12 at 2.51.34 AM