Why does iPhone take 30-40 second to boot and MBA takes 12 seconds

[vistadude]

Boot up time is literally the time it takes to transfer the OS and apps from flash memory to RAM and virtual memory. It doesn't have much to do with processor speeds but usually newer computers/phones have faster memory, motherboards, and caches. Macbook hard drives and ssds are much faster than phone flash memory. It's sort of like comparing transferring photos from an external hard disk to a mac vs a slow sd card to a macbook.

 

[MH01]

Boot up time on a laptop is important, as they are meant to be powered down on a regular basis, hence optimised.

I doubt phones have been optimised for boot speed, mine can go month and months without a reboot.

 

[steve-p]

This. It's great to know that there are extremely law abiding citizens out there, but just putting your phone in airplane mode is enough to eliminate whatever minimal risk existed in the first place. I have never once completely turned my phone off on a flight and I never will. Same goes for everyone else I know who travels frequently.

The main reason I always enable airplane mode when flying is because it uses much less battery as it's not ramping the transmit power up trying to reach a cell tower or WiFi access point

 

[foobi]

Why do f turn off a iPhone? Do we even need the power button....

 

[scaredpoet]

I can see there being some reasons for shutting off a phone now and then, so a power button IS necessary. Still, 20-30 seconds isn't a shabby boot time for a smartphone. I think the real question would be: what cases are there that someone needs a phone to frequently power down fully, and then boot up really fast?

Even in an airplane situation, there's a LOT of time to kill between the time the plane touches the ground and making it to the gate.