I'd love to tell you what it did suboptimally in my usecase at the time, but I no longer have the code and it's been so long I don't remember the specifics.

Like I said in my earlier comment, it was so long ago the performance remarks may be outdated and the project may have resolved them.

I would like to give Futhark another try, but I need easy and portable integration in either Go or Rust, and as far as I can tell, that's not the case today? For my current project, I ended up selecting webgpu for my GPU compute needs.