Scrolling on Windows using qt/win is a real pain. I just discovered that if instant preview for math is turned on, then the scrolling speed is about the same as with qt/x11.
No matter how fast I am able to roll the mouse wheel, LyX always catches up, which is not the case when instant preview is turned off. Indeed, in this case, when there are many displayed equations the scrolling may stop even if I am still rolling the wheel. Scrolling speed also increases with qt/x11 when instant preview is turned on, even if the improvement is not as dramatic as with qt/win. Note that I am sure that the culprit are the equations, as without them the scrolling speed is acceptable. So, what is doing LyX with equations to justify such a slow down? -- Enrico
