For an end-to-end model, slowing the first operation may improve overall performance by keeping data in cache for the second operation.

“what speed of light is referring to because in these cases for the kernels like we always start with everything in in uh like hbm for example right but you can imagine that like an end-to-end kernel like an end-to-end model what you might want to do between two layers is like you might sacrifice the speed of the first operation to keep things in the cache for the second operation”