Re: Proposal: enable accessibility by default for GNOME

[Willie Walker <William Walker Sun COM>]

Wow - that polling really does bite.  :-(  Looks like it's been in there 
for 6 years!

http://svn.gnome.org/viewvc/at-spi/trunk/registryd/deviceeventcontroller.c?revision=326&view=markup

To me, it kind of seems rather inefficient for the prototypical use case 
of mouse motion events, which is to drive the region of interest for the 
magnifier.  I logged a bug/rfe a while ago and to just have gnome-mag 
track the mouse directly rather than require two CORBA actions per mouse 
movement (one from the bridge to Orca and one from Orca to the 
magnifier): http://bugzilla.gnome.org/show_bug.cgi?id=522967.  I haven't 
had time to create a patch, and the current maintainer is only doing so 
very sporadically due to time constraints.

Regardless of making modifications such as those requested in bug 
#522967, I wonder if we can make modifications to the bridge to only do 
the polling if someone has requested to be notified of the events?

Will

Matthias Clasen wrote:
> On Thu, Jul 31, 2008 at 2:33 PM, Luis Villa <luis tieguy org> wrote:
>
> > I'd love to see hard performance numbers before we reach that
> > conclusion. (I really don't care about memory numbers. Geeks look at
> > top; my fiancee just sits and taps her fingers waiting for GNOME to
> > log in.)
>
> Here is one datapoint:
>
> https://bugzilla.redhat.com/show_bug.cgi?id=227476
>
> a11y causes frequent wakeups which eat power.
>
>
> Matthias