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terrapower / armi

An open-source nuclear reactor analysis automation framework that helps design teams increase efficiency and quality
https://terrapower.github.io/armi/
Apache License 2.0
212 stars 82 forks source link

How many parallel processes should tests have on GitHub Actions? #1740

Open john-science opened 1 week ago

john-science commented 1 week ago

Right now, when we run ARMI unit tests on GitHub Actions, we do four parallel processes:

https://github.com/terrapower/armi/blob/de4eeeec280abf155f19cd709a5f32b9f899fef0/.github/workflows/unittests.yaml#L32

https://github.com/terrapower/armi/blob/de4eeeec280abf155f19cd709a5f32b9f899fef0/.github/workflows/wintests.yaml#L27

https://github.com/terrapower/armi/blob/de4eeeec280abf155f19cd709a5f32b9f899fef0/.github/workflows/coverage.yaml#L33

But is "4" the optimum number, to make the tests run as fast as possible?

We should try various other numbers, to see if we can run these tests faster.