Android Runtime Optimization

Android Lollipop includes a new virtual machine called ART (Android Runtime.) ART uses AOT (ahead-of-time) compilation into native code, which performs better than JIT (just-in-time) compilation into bytecode. You can configure ART to perform this optimization in different ways. Android Lollipop includes the dex2oat tool for optimizing applications on deployment.

Compiler Filters

In L, dex2oat takes a variety of --compiler-filter options to control how it compiles. Passing in a compiler filter flag for a particular app specifies how it’s pre-optimized. Here’s a description of each available option:

• everything - compiles almost everything, excluding class initializers and some rare methods that are too large to be represented by the compiler’s internal representation.
• speed - compiles most methods and maximizes runtime performance, which is the default option.
• balanced - attempts to get the best performance return on compilation investment.
• space - compiles a limited number of methods, prioritizing storage space.
• interpret-only - skips all compilation and relies on the interpreter to run code.
• verify-none - special option that skips verification and compilation, should be used only for trusted system code.

Preference

Magisk

You can change the default compiler-filter with the one you prefer (or want to experiment with). Just go to Terminal Emulator and then type:

art_magisk

And then it'll present you with a menu that is pretty simple and easy to work with.

Non-Magisk

You can change the default compiler-filter with the one you prefer (or want to experiment with). Just go to Terminal Emulator and then type:

setfilter [--compiler-filter] [file]

If you haven't entered your filter, it'll present you on how to use it.

UNIFIED Installer

With unified installer, the zip now installs whether you use Magisk, SuperSU or, if no other stuff is detected, Init.d. It installs in this order according to detection:

> Magisk > Systemless SuperSU > System SuperSU > Init.d

Changelog

v1.5

• update-binary updated to support Magisk v13+
• exit codes fixed
• Future proofing
• Other cosmetic changes

v1.4.1

• setfilter needs root access!
• art_magisk needs root access!
• Dynamic version comment for Non-Magisk!

v1.4

• Code Optimization
• Another attempt for Samsung
• Added setfilter pseudo-binary for Non-Magisk
• Minor debloat

v1.3

• Workaround installation modified and fixed bugs
• Samsung + Xposed Warning in Installer
• Uninstaller Fixed
• Nexus 6P/other devices on 7.1+ issues fixed (removed pm.dexopt.bg-dexopt)
• Samsung + Xposed possible fix (needs testing)
• dalvik.vm.dex2oat-filter as the "Reference" property

v1.2.5

• Moved workaround installtion to config.sh, making it easier for me
• dalvik.vm.dex2oat-filter will also change when selection a filter, again

v1.2

• Revert dalvik.vm.dex2oat-filter to speed
• Removed dalvik-cache wiping during installation
• Removed dalvik.vm.boot-dex2oat-threads
• Tweaked Installation messages
• Tweaked davik-cache wiping in art_magisk
• Fixed "unknown operand" error in art_magisk

v1.1

• Logging Improved
• Saved compiler filter now survives updates on both Magisk and Non-Magisk (unless something prevents it to)
• Moved dalvik.vm.dex2oat-thread_count back to system.prop
• Add dalvik.vm.dex2oat-threads
• Add dalvik.vm.boot-dex2oat-threads

v1

• Unified Installer
• dalvik.vm.dex2oat-thread_count is now only applied Android 6+ previous change logs deleted

More info about this topic here

See XDA Thread

Non-Magisk (deprecated use UNIFIED instead)