jannem, @VileLasagna Has a blog post on the relative speed of different #GPU compute frameworks on the same hardware and driver.
Tl;dr: on an #Nvidia card, with Nvidia drivers, #CUDA is the slowest, by far. Fastest is our old stalwart #OpenCL - almost twice as fast when used only for compute. #Vulcan is good, and the least affected by using the card for your desktop at the same time. Read it - it's good.
https://vilelasagna.ddns.net/coding/if-you-want-performance-maybe-you-should-drop-cuda/