Surpass the 10000 file limit for quick switcher

The aim is to solve the problem in this post:

I’m imagining an option to change the 10000 file limit (to 20000, 30000 for example.)
Would be even better if this can also apply to wiki links.

(As I know nothing about how this algorithm works, maybe this is not as simple as it sounds? Of course there should be a disclaimer about performance issue, but the limit would be up to the user to decide.)