uv pip takes ~8x as long as regular pip install with Python 3.13

[EwoutH]

In our CI setup, we noticed uv pip taking very long to install our package, compared to uv pip, on Pyhton 3.13. While normally uv pip is way faster.

• uv pip: ~4 min (log 1, log 2)
• pip: 31 seconds (log)

Almost all time is in the "Prepared packages" step.

What probably matters, is that with setup-python we cache pip dependencies. But that doesn't work for uv right?

Can we either cache uv, or can something be sped up in the uv preparing packages step to speed this process up?

Edit: An uncached pip install on Python 3.13 also takes quire long, because Pandas is build from scratch.

• Support for uv Package Manager Caching actions/setup-python#822

[charliermarsh]

Yeah, you can save the uv cache. I recommend something like this: https://docs.astral.sh/uv/guides/integration/github/#caching

[EwoutH]

Thanks for the docs!

[EwoutH]

Maybe you can enable the GitHub Discussions, in many repos it's a nice place to ask questions!