[LAU] my computer and screen reeder orca are extreemily slow when jack audio is in use any idea what the problem could be?

[trahern culver]

hey all i have a laptop with a pentiom Intel i7 2.90 ghz core 2 duo processor and 8gb ram but when jack audio is in use it takes the laptop and my screen reeder called orca ages to respond does any one know what the problem might be? i've herd of some thing called a memory lock could it have some thing to do with that? 

your help with this problem would be most welcome. Kind regards trahern.