iPhone vs Android
Rikki Cattermole via Digitalmars-d
digitalmars-d at puremagic.com
Mon Sep 12 16:19:11 PDT 2016
On Monday, 12 September 2016 at 22:57:23 UTC, Andrei Alexandrescu
wrote:
> An interesting article written for laypeople:
> http://www.theverge.com/2016/9/12/12886058/iphone-7-specs-competition
>
> One quote that may be of relevance to us: "As to the iPhone’s
> memory, this is more of a philosophical distinction between
> Apple and Google. The former is neurotic about killing
> background processes and dumping background apps from memory in
> iOS, whereas the latter is more liberal with app management in
> Android (though Google is gradually moving toward the Apple way
> of doing things). The upshot is that an iPhone can feel super
> smooth and responsive with half the RAM of an Android device.
> RAM consumes power, so having less of it is another factor
> contributing to the iPhone’s efficiency lead."
>
> This may be interpreted as follows: the iPhone uses native apps
> with reference counting whereas the Android uses a virtual
> machine with tracing garbage collection. It follows that the
> latter needs more memory for the same performance, and is more
> jerky in behavior than the former. Wondering to what extent
> this is true. If it is, that provides more impetus for
> reference counting for D by the following logic: (a) it is
> likely that in the future more code will run on portable,
> battery-powered systems; (b) battery power does not follow a
> Moore trajectory, so at this point in history demand for
> battery lifetime is elastic.
>
>
> Andrei
I would interpret it quite differently to this.
On iOS applications that are not currently in the foreground or
are a service get killed unconditionally.
On Android applications keep running even when they are no longer
foreground but instead get 'paused'. Here is a handy little graph
of the different events an Android app can be in[0]. Note the
difference between onPause and onStop.
[0]
https://developer.android.com/reference/android/app/Activity.html#ActivityLifecycle
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