RESOLVED WORKSFORME45456
REGRESSION (r67001): Scrolling by holding down a scroll arrow is much slower than in IE (or previous versions of Safari) 
https://bugs.webkit.org/show_bug.cgi?id=45456
Summary REGRESSION (r67001): Scrolling by holding down a scroll arrow is much slower ...
Adam Roben (:aroben)
Reported 2010-09-09 07:46:10 PDT
To reproduce: 1. Go to any long webpage (this one is good: <https://bugs.webkit.org/attachment.cgi?id=66975&action=prettypatch>) 2. Click and hold on the downward scroll arrow The page scrolls far more slowly than it does in IE, or in Safari 5. This seems to be due to the new smooth scrolling behavior.
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Peter Kasting
Comment 1 2010-09-09 11:19:12 PDT
I can't repro on Chromium/Win (which shares the scrolling implementation); for me the smooth scrolling build scrolls at exactly the same speed as the non-smooth-scrolling build. (Which is how it's designed; the scroll system still scrolls the same amount per key repeat and processes repeats at the same rate.)
Adam Roben (:aroben)
Comment 2 2010-09-09 11:24:10 PDT
(In reply to comment #1) > I can't repro on Chromium/Win (which shares the scrolling implementation); for me the smooth scrolling build scrolls at exactly the same speed as the non-smooth-scrolling build. (Which is how it's designed; the scroll system still scrolls the same amount per key repeat and processes repeats at the same rate.) Can you reproduce using Safari 5 and a nightly build of WebKit?
Adam Roben (:aroben)
Comment 3 2010-09-09 11:25:18 PDT
<rdar://problem/8411846>
Peter Kasting
Comment 4 2010-09-09 11:53:21 PDT
(In reply to comment #2) > (In reply to comment #1) > > I can't repro on Chromium/Win (which shares the scrolling implementation); for me the smooth scrolling build scrolls at exactly the same speed as the non-smooth-scrolling build. (Which is how it's designed; the scroll system still scrolls the same amount per key repeat and processes repeats at the same rate.) > > Can you reproduce using Safari 5 and a nightly build of WebKit? No. I tested that page with Chromium w/ and w/o smooth scrolling as well as Safari 5 vs. last night's nightly (r67080, well past my smooth scrolling landing). With both the down arrow button on the bottom of the scrollbar as well as the down arrow key held down on my keyboard, each browser scrolled in the same time (within 1 sec. error due to my watch) whether smooth scrolling was present or absent.
Adam Roben (:aroben)
Comment 5 2010-09-09 12:31:43 PDT
My bad. Comparing Safari 5 to ToT I see the same thing as Peter: scrolling from the top of the page to the bottom takes the same amount of time regardless of smooth scrolling. I don't know what I was thinking before. Sorry for the false alarm! (And the smooth scrolling is pretty!)
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