Feel free to simply close out this issue if you are not interested but we just implemented QOI image format for VNC to deliver lossless remote desktops using Rust WASM clientside here:
https://github.com/kasmtech/noVNC/tree/master/core/decoders/qoi
Some docs here:
https://www.kasmweb.com/docs/latest/how_to/lossless.html

I have been wondering if SIMD optimizations were even possible on the server side for some time now, I tried out the stable branch with ssse3 and did see +- 10% in encoding speed vs rapid qoi depending on what image you feed to it. Looks like offloading the hashing has some promise especially once the AVX stuff is implemented.
Though I am specifically reaching out if you think the decoding could be sped up in a web browser? The compiled blob linked earlier in noVNC is a modified version of this implementation:
https://github.com/lukeflima/qoi-viewer

This is all functional, but under high load scenarios you need a pretty beefy client to maintain FPS at a gigabit. Even a small improvement on the web assembly side would have a large impact on overall smoothness of desktop delivery. Anything we do for desktop delivery is open source including these changes if possible.

Essentially I am wondering if you would be interested in some side work to put together a highly optimized open source WASM qoi decoder that takes a Uint8Array as input and spits back "ImageData" as a uint8clamped array and size information. We do 24 bit qoi without the alpha channel.