3 ms·
Bluetooth is slow. The transport is 3Mbps at max, if you subtract all the headers from different layers, you may have like 1.5-2Mbps practical transfer speed.
by mrheosuper 17d ago
Bluetooth is slow. The transport is 3Mbps at max, if you subtract all the headers from different layers, you may have like 1.5-2Mbps practical transfer speed.
- Dylan16807 17d agoSounds like the "or such" wins, but even with bluetooth speeds that means you're backing up 1-5 photos per minute and that helps a lot.
- mrheosuper 17d agoAnd harm a lot too, you phone can't deep sleep since it has to wake up periodically to process data from bluetooth stack. Combined with slow transfer speed, that gonna eat your battery like nothing.
- Dylan16807 17d agoPlaying audio over bluetooth also wakes things periodically, but it uses almost no power. With a similarly competent design photo transfer should be very battery efficient.
- mrheosuper 17d agoNo, most(if not all) bluetooth controller has audio offload, basically the cpu does not involve(or very little) when transfering data from storage to radio.
- Dylan16807 17d agoDon't you mean yes bluetooth controllers have audio offload? "similarly competent design" means you do the exact same thing in the other direction. Instead of rarely waking up the CPU to coordinate sending, you rarely wake it up to coordinate receiving.
- deleted 16d ago[deleted]