Thread

1. ladberg · 1785591919 · focus · HN ↗

   One elevator feature I specifically noticed at Apple Park but haven't seen anywhere else: elevator prefetching to the ground floor.

   I.e. in a bank of 2 elevators where one is resting on ground and the other is resting on a different floor, as soon as someone calls the ground elevator (which is already there and immediately opens) the other elevator (if idle) will move to the ground floor so that there's no delay the next time someone calls one from the ground floor.

   1. worldthruword · 1785592777 · focus · HN ↗

      Branch prediction or Floor prediction. If we know the traffic pattern from past data, we can optimize for it.

      1. worldthruword · 1785593330 · focus · HN ↗

         Lazy evaluation would save on money. Branch prediction would save on wait times. In places electricity can shut down, lazy evaluation would be preferable to make it work longer on limited battery.

Unofficial Hacker News client; not affiliated with Y Combinator.