FancyPlaysMC

Hey Guys i was wondering if i could get a Little help here. When im loading up the World every 5 seconds of the game heavy lagg ocurs. I've got an asus g75vw so certainly not because i need a better pc. I've also tried prioritizing java in the joblist and changing Graphics while doing so but nothing the game still laggs. any advice out there cus this is really annoying??????