Do we really need Sleep(1000) in the loop at APC Inject?

As far as I know, APC functions are called when a thread is in an alertable state, but the Sleep(1000) in APC inject is in the current thread, not the target one, so I think the Sleep(1000) function can be out of the loop.

must add sleep(1000), must Ensure that each thread has sufficient time to establish a connection with MSF or cobalt strike