Just got this phone from bazaar (changed from Xperia E) and i kinda like it!
This is my configuration with this crazy score which I think could be a bug somehow...
System: Stock 5.1.1 (A.1.236) Unlocked
Kernel: Advanced kernel - v16
CPU: 2419max, 300min, smartassV2
Schedule worker queues on awake CPUs: True
CPU Hotplug: Zen Decision
IO: Zen, read-ahead: 512kb
IO-sd: Zen, read-ahead: 128kb
Resulting IO (inside UX category) score seems to be too big as the io settings weren't changed by me.
http://imgur.com/XEMuOZG