Do your phone when scrolling facebook very sluggish and slow loading image? Even browser and YouTube also jerky but not as bad as Facebook app.

i did not install many apps and still got 400mb unused ram. Even my windows phone don't have scrolling for all the apps and it only dual core with 2-3years old specs.

how to enhance the performance without root? I don't think root will solve the problem cause Facebook not high intensive app require fast cpu