I'm not completely sure what you're asking here, but I suspect it is quicker to turn interrupts off and on than to drop the handler and re-apply it. Probably not by much, but usually, if you're processing interrupts, speed is important.
I'm not completely sure what you're asking here, but I suspect it is quicker to turn interrupts off and on than to drop the handler and re-apply it. Probably not by much, but usually, if you're processing interrupts, speed is important.