riichi-hand-rs VS Rust-CUDA

Other than that, I've published my very first Rust library riichi-hand-rs (I'm happy to get any feedback for it!). It's a library used in another my project, chombot, and it's core feature is parsing Japanese Mahjong hands in a human-readable format, verifying, and rendering them. I decided to split this part into a library in order to improve the overall quality of the code, and hopefully have some more motivation to add some more features into it, that will not necessarily make it into the main app. Actually, chombot has had been implemented in Kotlin before - it was last week that I've decided to rewrite it in Rust and it's been loads of fun!

Given your criteria, you might want to consider (modern) C++.

* Fast - in many cases faster than Rust, although the difference is inconsequential relative to Python-to-Rust improvement I guess.

* _Really_ utilize CUDA, OpenCL, Vulcan etc. Specifically, Rust GPU is limited in its supported features, see: https://github.com/Rust-GPU/Rust-CUDA/blob/master/guide/src/... ...

* Host-side use of CUDA is at least as nice, and probably nicer, than what you'll get with Rust. That is, provided you use my own Modern C++ wrappers for the CUDA APIs: https://github.com/eyalroz/cuda-api-wrappers/ :-) ... sorry for the shameless self-plug.

* ... which brings me to another point: Richer offering of libraries for various needs than Rust, for you to possibly utilize.

* Easier to share than Rust. A target system is less likely to have an appropriate version of Rust and the surrounding ecosystem.

There are downsides, of course, but I was just applying your criteria.

Technically, yes. There are crates for OpenCL and CUDA, although official ROCm support does not exist yet.

Also you might not be aware but you can write cuda in rust now also https://github.com/Rust-GPU/Rust-CUDA

On the other hand CUDA is optimized to death and very good. Documentation and codes examples are everywhere (in C++ at least) but it is one more piece of software to install/configure and interact with from Rust. I don't know if Rust-CUDA is good or not. It's a WIP but the development seems stalled at this point (no commit since July)

Rust CUDA

With Rust-CUDA you can write Rust code to run on the GPU quite easily, long as the code is no_std (and you have a NVIDIA GPU).

There’s also https://github.com/Rust-GPU/Rust-CUDA

And here's an example on how to add two floats using Rust-CUDA: https://github.com/Rust-GPU/Rust-CUDA/blob/master/examples/cuda/gpu/add_gpu/src/lib.rs

I can't say whether or not it works well, and seems maybe fiddly to install, but Rust-CUDA might work for you.