There's a high setting and a low setting.

The high setting runs for the Current Window, as part of the swap.
The low setting runs for the Windows: All without Current, also on the swap.

Having lesser settings on the windows you're not using, is going to help performance.

I found having a large disparity between high and low, would add a little bit of a delay to the swap speed.
Without these settings, swap was basically (or very close to) instant.
With a large disparity, there was a 3/4 second extra delay there.
Because of that, I ended up with more like High Settings and Medium Settings.
Or maybe more along the lines of 80% and 60% of maximum.