A bit of performance left on the table

[bconstanzo]

This module turned out to be the main performance bottleneck on a tool I've been working on, and I found out there could be some performance left on the table. On my computer* I'm getting 20-30% improved decoding speed by adding a few cython types, though I've not managed to clean up everything just yet.

Is this project still active? I can send a pull request and if you can check if the changes hold on other OSes/versions, it could be valuable for others.

* under python 3.10 64 bit, on windows 10

[K0lb3]

The project isn't active anymore.
It got replaced by texture2ddecoder, which supports many other formats on top.

In case you want to stick with astc_decomp I would advise to directly write C code to wrap the C functions instead of using Cython, as it's faster this way.

[bconstanzo]

Hey there! I made a fork of this and tuned the Cython code quite a bit to get that missing performance. For a project where I'm contributing there was a lot of value in keeping the API consistent and just getting the speedups. Thanks for the pointers, and your effort building this in the first place.