> Another kind of misconception: data transfer is a _really_ overlooked issue. […] If you want to write 20mb of data to a buffer, that's not just a memcpy, all that data has to go over the PCIe buss to the GPU […], and that's going to be expensive (in real time contexts). Similarly if you want to read a whole large buffer of results back from the GPU, that's going to take some time.

Does having a unified memory, like Apple’s M-series chips, help with that?