I don't, but I'm general it matters most for the cheapest C calls, so the functions doing the least work. Batching those somehow can give big speedups, over 2x,

I don't, but I'm general it matters most for the cheapest C calls, so the functions doing the least work. Batching those somehow can give big speedups, over 2x, depending on how much of the total time was going into cgo overhead.