When to use Android's ArrayMap instead of a HashMap?

Question

Android have their own implementation of HashMap, which doesnt use Autoboxing and it is somehow better for performance (CPU or RAM)?

https://developer.android.com/re

Answer 1

Is there any reason for you to attempt such a replacement?

If it's to improve performance then you have to make measures before and after the replacement and see if the replacements helped.

Probably, not worth of the effort.