I hate laggyy device, maybe you don't. I got root, maybe your are afraid to void your warranty.
Do away with task managers that are filled with bloatwares.
Let's grab some efficient smooth SenseUI, our device running smoothly.
Head to play store download minfreemanager,
Run app, tweak at your risk
Look for Content provider go down from 45 to 30
Empty app raise to 96
Hit menu tap apply, tap apply on boot and tap quit.
Grab some beer and watch how things runs smoothly.
Don't want to mess around with any numbers
Tap menu at left side of your device,
Tap Preset, tap aggressive that's all there is, quit.
But I prefer Content Provider 35, Empty App 96 tweak
Rooted device only