bug#16594: 24.3.50; very slow redraw when resizing windows horizontally

[Paul Eggert]

On 02/06/2014 07:23 AM, Darren Hoo wrote:
> > >   fn = 0x00000001000b4d90 (Emacs`poll_for_input at keyboard.c:1971)
> According to the documentation of poll-period:
>
>    Polling is needed only when using X windows and SIGIO does not work.
>
> if if SIGIO IS available do we still need POLL_FOR_INPUT for detecting
> C-g on NS?

Yes, under the current design, because the user can invoke 
(set-input-interrupt-mode nil). I don't know why we're exposing that 
capability to the user.