Actually that last frame (frame 198) isn't showing a completely refreshed screen - look closely at the bottom - the last elements to appear is the row with:-
(Home) -24 hrs Page down Page Up +24hrs
And frame 198 isn't showing that row yet. Compare and contrast with your first frame (frame 150). This would imply it's actually taking longer than 1.88 seconds.
But that's moot really. The delay is real and noticeable.