my screen usually or should i say always freezes like 5 secs or more when i put texture pack to my mc world

A LOT OF MC PLAYERS NOTICED THIS TO AND IM NOT THE ONLY ONE THAT SCREEN FREEZES ALL THE TIME MORE THAN 5 SECS even i don’t put texture pack to my world it still freezes but 2 secs

you can see around 7-8 secs of the vid that i randomly pause/freeze for nothing