I think someone said it costs +50% in time to swap out pages when it was enabled, but as soon as you are swapping, such timings have very little bearing on your

I think someone said it costs +50% in time to swap out pages when it was enabled, but as soon as you are swapping, such timings have very little bearing on your experience, since any time a program have to wait for a page to get in from a disk, the process is already running 1000x slower than it should.