Android (5.0+) Runtime (ART):

Android (5.0+) Runtime (ART):
* https://en.wikipedia.org/wiki/Android_Runtime
* Android runtime and Dalvik: https://source.android.com/docs/core/runtime
ART native compilation / optimization, and tweaks:
* Configure ART: https://source.android.com/docs/core/runtime/configure
* Optimize Android runtime: https://www.digi.com/resources/documentation/digidocs/90001546/task/android/t_faq_optimize_android_runtime.htm
* Is deleting /system/bin/dex2oat file safe? https://android.stackexchange.com/questions/225524/is-deleting-system-bin-dex2oat-file-safe/
* By default ART optimizes for speed; those are prop tweaks for storage space optimization: https://t.me/OTIdroid/514565
* [Lollipop] Free up significant amounts of space: https://xdaforums.com/t/guide-art-mod-lollipop-free-up-significant-amounts-of-space-on-your-moto-e.3151510/