You'd pass pointers to the buffers over the channels, so there wouldn't be much copying. You would need to be careful that once one goroutine has sent a pointe

You'd pass pointers to the buffers over the channels, so there wouldn't be much copying. You would need to be careful that once one goroutine has sent a pointer to a channel, it doesn't touch that buffer again (until the receiver has finished with it, at least), otherwise you can get data races. You're implementing ownership semantics here, and unlike in some languages i could name, you're doing it without help from the type system.