Just clean installed the latest RC build during lunch time: it runs really well and I can confirm that the kernel looks fresh.
I repeated my quick scrolling test with graph bars and immediately switched (again) to conservative governor which gives less dropped frames.
It is beyond me how other more famous governors still don't guarantee the same performance of conservative, but I'm really happy with this setup.
There is no mystery in this. Conservative governors scale slowly. While the "famous" ones scale quickly.
Whenever there is a load, the cpu should scale up quickly, finish the task and then go back to sleep asap. Conservative governors scale up and down slowly.
Now how this affects the "scrolling test". We perform the test by rapidly scrolling up and down. The "famous governors" will try scale up and then quickly come down too. As the frequencies drop you may see a few frames go above the green 60fps line.
Conservative govs due to their slow nature main relatively stable frequencies during scrolling which gives them an advantage in fps.
But in real world, I don't see a scenario where we need to scroll up and down like we do in scrolling test. Thus the benefit of using conservative appears to be very limited. Secondly as long as you are below the green line (60fps) it doesn't matter. Our eyes cannot differentiate between 70 and 80 fps. But conservative governors here are at a loss because during heavy loads such as gaming, sometimes the scaling is too slow resulting in framedrops and freezes.
I have been experimenting with interactive + zzmoove (another conservative governor) since even before XDA wrote about it. Yes it feels smooth but games sometimes lag.
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This is just a crude explaination which I found out from my experience. If anybody has a better explanation, they are welcome to share it