Sign [Q] Performance impact after Encryption enabled?

Guys,

anyone tried enabling device encryption? I did it and I feel that device is not smooth.
I made HR before doing this I don`t have even half of storage used. Stock soft - not rooted.

Scrolling of pages is not smooth: in dolphin in facebook for instance.
This drive me crazy.

I pay attention for perfect smoothness since my girl bought Iphone 5s where
everything is smooth like butter.

Could anyone who tried encryption option post experience here?

Regards