Today i found on z1 forums libs for Qualcomm devices for better runtime.
It couse (in theory) faster opening apps and should increase battery life.
My phone is obviously Z1Compact
How to install:
Flash via recovery.
No need to wipe anything.
I installed this on latest stock 4.4.4 108 and must say that this increase my runtime in antutu from 2069 to 2250.
This is the link to z1 forum:
This is the libs
These are new libs from Z3
New file from Z3 is: