NEW 32440
Pan scrolling is slow, jerky, buggy compared to Firefox 
https://bugs.webkit.org/show_bug.cgi?id=32440
Summary Pan scrolling is slow, jerky, buggy compared to Firefox
Peter Kasting
Reported 2009-12-11 10:23:26 PST
The pan scrolling algorithm notes on it that it "matches Firefox' implementation", but this is not quite true. * The velocity calculation is the same, but WebCore scrolls every 50 ms whereas Firefox scrolls every 20 ms. This means WebCore's scroll is jerky and sluggish in comparison. * The dead zone near the center is larger on WebCore, meaning if you increase the scroll speed by dropping the delay to 20 ms, it's not possible to achieve as fine-grained control of scroll speed as Firefox. There are also two other bugs: * The center icon jumps sometimes under rapid scrolling. * There's no accommodation for timer lag, so pages which are more complex and take a long time to scroll feel laggy.
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