But if you can't clearly see "lag" or "stutter", is it really lag or stutter? I'm not trying to be cute here, but if you need extraordinary means to demonstrate something that is not clearly perceptible, what is the real issue?
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Important in what respect? Holding a beta software to some random benchmark of your choosing? (and mods: I am not bickering: i really am interested in knowing how nearly imperceptible imperfections are important to these end users).
That's not what I mean.
I can clearly see that *something* strange is happening. It's not *right* and seems *off* or *laggy*.
Since I knew something strange was happening, but couldn't quite put my finger on it, I decided to slow it down to accurately analyze what it's ACTUALLY doing when it lags.
For the first few frames, the background (wallpaper) does not move at all, then there's a skip in the frame rate at the very moment that the wallpaper begins zooming out. Then the icon goes to it's normal size, but the wallpaper lags behind (presumably since it was late to start animating at the beginning of it all). THAT'S what's happening.
Like I said. You can easily tell something is *wrong* or *offputting* about it and when it's slowed down, it's easier to put an explanation behind it.