TIL about GPU.js, which on the face of it seems like exactly what you were asking for in your original comment. Was the problem that the code you wanted to writ

TIL about GPU.js, which on the face of it seems like exactly what you were asking for in your original comment. Was the problem that the code you wanted to write didn't quite fit into the expected execution model, even if GPU.js allowed you to write things in an ergonomic way?