Home / Til / Python / PyTest: Run on multiple cores

PyTest: Run on multiple cores

How To

To run PyTest on multiple CPU cores, perform the following steps:

1. Install the pytest plugin pytest-xdist
2. Call pytest using the plugin’s additional parameters, default usage: pytest -n auto. With this call, PyTest will spawn a number of workers processes equal to the number of available CPUs, and distribute the tests randomly across them.

For a more refined distribution of the tests, see some of the following options:

• Distribute tests amongst cores grouped by module for test functions and by class for test methods: pytest -n auto --dist loadscope
• Distribute tests amongst cores grouped by their containing file: pytest -n auto --dist loadfile

References

• PyTest xdist