For what it's worth, I was suffering from exactly the same thing and
eventually unbound the mwheel stuff altogether and simply rebound them to
the following. After that, scrolling was sane again.

(defun scroll-up-one ()
  (interactive)
  (scroll-up 1))

(defun scroll-down-one ()
  (interactive)
  (scroll-down 1))

(defun scroll-up-double-speed ()
  (interactive)
  (scroll-up 3))

(defun scroll-down-double-speed ()
  (interactive)
  (scroll-down 3))

(global-set-key (kbd "<mouse-4>") 'scroll-down-one)
(global-set-key (kbd "<mouse-5>") 'scroll-up-one)
(global-set-key (kbd "<double-mouse-4>") 'scroll-down-double-speed)
(global-set-key (kbd "<double-mouse-5>") 'scroll-up-double-speed)
(global-set-key (kbd "<wheel-up>") 'scroll-down-one)
(global-set-key (kbd "<wheel-down>") 'scroll-up-one)
(global-set-key (kbd "<double-wheel-up>") 'scroll-down-double-speed)
(global-set-key (kbd "<double-wheel-down>") 'scroll-up-double-speed)

Regards,
Elias


On 24 January 2014 03:52, Sam Steingold <sds@gnu.org> wrote:

> Hi,
>
> > * Jan D. <wna.u.q@fjvcarg.fr> [2014-01-23 14:00:09 +0100]:
> >
> > Sam Steingold skrev 2014-01-22 21:07:
> >> In GNU Emacs 24.3.50.1 (x86_64-apple-darwin13.0.0, NS
> apple-appkit-1265.00)
> >>   of 2014-01-21 on sds-MacBook-Pro.local
> >> Windowing system distributor `Apple', version 10.3.1265
> >> Configured using: `configure --with-ns'
> >>
> >> Whenever I touch the mouse, emacs scrolls like crazy, starts blinking
> >> (visible-bell is on), and *Message* contains these:
> >>
> >> byte-code: End of buffer [5 times]
> >> byte-code: End of buffer [5 times]
> >> byte-code: Beginning of buffer [7 times]
> >>
> >> lossage is:
> >>
> >> <double-wheel-down> <wheel-right> <wheel-down> <wheel-down>
> >> <double-wheel-down> <triple-wheel-down> <triple-wheel-down>
> >> <triple-wheel-down> <triple-wheel-down> <wheel-up>
> >> <double-wheel-up> <wheel-down> <double-wheel-down>
> >> <wheel-up> <double-wheel-up> <triple-wheel-up> <triple-wheel-up>
> >> <wheel-up> <select-window> <wheel-up> <double-wheel-up>
> >> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
> >> <triple-wheel-up> <triple-wheel-up> <wheel-down> <double-wheel-down>
> >> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down>
> >> <triple-wheel-down> <triple-wheel-down> C-h l
> >>
> >> is this a known bug?
> >> feature?
> >>
> >> I suspect that there is a timing parameter in the mouse handling code
> >> which is too small...
> >>
> >> PS. All the other applications (firefox &c) behave normally.
> >>
> >
> > The blinking thing has been discussed in bug 16196.
>
> Thanks for the pointer.
> Your problem is slightly different from mine:
> you don't like the beeps,
> I don't like the scroll amount.
>
> > There is a mwheel workaround in there.
>
> Well, the workaround is only a partial fix. (see below)
>
> > As for "crazy", that is not a clear technical term so I don't know what
> > that means.
>
> My problem is that there are too many mouse events are generated,
> so a touch to the mouse results in a huge scroll.
> Basically, a scroll means either end-of-buffer or beginning-of-buffer.
>
> > If you mean that is scrolls very fast, I guess you have to
> > either fix mwheel or adjust mouse acceleration in OSX settings.
>
> All the other applications seem to handle the mouse as I want them too.
> The problem seems to be with Emacs.
>
> > Here (with Magic mouse and trackpad) the speed is reasonable.  Faster
> > than GNU/Linux/Gtk+ on the same hardware, but still OK.
>
> Okay, so you are confirming my impression that the problem is with Emacs.
> Thanks.
>
> elp-instrument-function appears to indicate that mwheel-scroll is called
> much more often than I want it to be called - 20+ times for a simple
> touch of the mouse.
>
> --
> Sam Steingold (http://sds.podval.org/) on darwin Ns 10.3.1265
> http://www.childpsy.net/ http://mideasttruth.com http://www.memritv.org
> http://memri.org http://dhimmi.com http://americancensorship.org
> If money were measured in piles, I would have had a pit of it.
>
>
>