[Q] My Galaxy Core Having A Lag Spike topic

Hello Guys..
first of all,sorry if my english was bad..im an indoensian and still learning

So this is my problem,
My galaxy core always lag about every 1-3 second
it happens when playing all games and when bootanimation

i already tried flashing stock offiical firmware+data factory reset,but not work:rolleyes:
can you help me to fix this please...:fingers-crossed:

Thanks