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by miohtama 1310 days ago
My guess is that iPhone is purely “kill app” instead of “compress memory / swap” OOM model. This makes more sense for mobile.
2 comments
Sirened 1310 days ago
iOS uses memory compression but not swap. iOS devices actually have special CPU instructions to speed up compression of up to page size increments specifically to aid in this model [1]

[1] https://github.com/apple-oss-distributions/xnu/blob/bb611c8f...

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musicale 1310 days ago
IIRC from WWDC they said that inactive/suspended apps get their memory compressed to free up memory for the current active/foreground app.

Seems to mesh well with the iOS idea of using a single app at a time and minimizing background processing in apps that you aren't actively using.

In an out of memory situation I think apps just get killed as you suggest.

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