Introducing tox-uv

[emdneto]

uv makes pip install faster. It works like this: uv pip install and we can have tests running faster locally and in CI. The tool is from the creators of ruff.

The main improvement I see here is the Dependency caching and fast resolution of packages during pip install. We can benefit from this for local development to avoid slow tests, mainly the git clones in contrib tests.

This PR also introduces the usage of tox-uv which is a tox plugin that supports venv runner with uv.

At this first moment, I'm proposing an opt-in usage, so you need to pass an environment variable to make use of the UV feature.

[zhihali]

The result is quite interesting, the uv indeed quicker than pip. I run 6 times for asgi and wsgi, and got these results. Maybe the times I try not enough, but we could roughly say this is a good optimization.

WSGI Results

Tool	Run	Setup Time	Command Time	Total Time
pip	1	0.19s	25.32s	25.65s
pip	3	0.34s	23.51s	23.99s
pip	4	0.05s	24.17s	24.35s
uv	2	4.50s	1.68s	6.31s
uv	5	0.71s	0.97s	1.81s
uv	6	0.04s	1.03s	1.19s

WSGI Average Times:

• pip: 24.66s
• uv: 3.10s (excluding first run: 1.50s)

ASGI Results

Tool	Run	Setup Time	Command Time	Total Time
pip	2	0.05s	25.21s	25.39s
pip	3	0.05s	22.62s	22.80s
pip	4	0.05s	20.53s	20.71s
uv	1	1.12s	14.28s	15.53s
uv	5	0.05s	8.48s	8.67s
uv	6	0.05s	8.04s	8.22s

ASGI Average Times:

• pip: 22.97s
• uv: 10.81s (excluding first run: 8.45s)

[emdneto]

The result is quite interesting, the uv indeed quicker than pip. I run 6 times for asgi and wsgi, and got these results. Maybe the times I try not enough, but we could roughly say this is a good optimization.

WSGI Results

Tool Run Setup Time Command Time Total Time
pip 1 0.19s 25.32s 25.65s
pip 3 0.34s 23.51s 23.99s
pip 4 0.05s 24.17s 24.35s
uv 2 4.50s 1.68s 6.31s
uv 5 0.71s 0.97s 1.81s
uv 6 0.04s 1.03s 1.19s
WSGI Average Times:

• pip: 24.66s
• uv: 3.10s (excluding first run: 1.50s)

ASGI Results

Tool Run Setup Time Command Time Total Time
pip 2 0.05s 25.21s 25.39s
pip 3 0.05s 22.62s 22.80s
pip 4 0.05s 20.53s 20.71s
uv 1 1.12s 14.28s 15.53s
uv 5 0.05s 8.48s 8.67s
uv 6 0.05s 8.04s 8.22s
ASGI Average Times:

• pip: 22.97s
• uv: 10.81s (excluding first run: 8.45s)

Yeah got similar results here. Thanks for that @zhihali. Greatly appreciated. The ASGI is slower because I left the test requirements install using pure pip purposely to see the difference

[xrmx]

[xrmx]

I like this, is there a reason you stopped converting halfway tox.ini?

[emdneto]

I like this, is there a reason you stopped converting halfway tox.ini?

No big reason. Just wanted to get some opinions before moving forward with all the changes

[xrmx]

There are also docs and docker-tests environments that can be converted