I think you should look at your machine specs first. The last thing you want to do is swap out. What is the point of the ram if it's not being used? OS X also has memory compression, since 10.9 Maveriks I believe. If you're on an SSD, whilst it's fast paging could reduce the WLC (Wear Levelling Count) but only if you're paging lots (then you have a low memory problem and I suggest you add more :) ), but WLC is not a problem generally unless you're writing out 150-300 TB. Lot's of games modify their process priority for foreground and background focusing (as does the NT Kernel for quanta boosting). You COULD boost the priority of your game to ABOVE NORMAL (but not higher and DEFINATLY not real time), but keep in mind DirectX is not pre-emptive in nature it is co-operative.

How do you know it is slowing down your games?

Nowdays we have 16gb+ in laptops so memory is not an issue, it is better to USE this memory than to have it IDLE doing nothing, memory is supost to be used. It is better to have it compressed than paged out. You could install regmon and monitor the registry reads for values that are either there or MISSING (indicating a DEFAULT value in the kernel) then add /modify the registry key. I will guess its a kernel value in the registry. This is their latest optimisation to MITIGATE (PREVENT) paging out to swap file on the disk.

Disable file compression windows 10