Re: [orca-list] Concerns about Orca's performance

["Jennifer" <fluffy_bunny_1988 hotmail co uk>]

I have the exact same problems on my netbook.

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From: "Jacob Schmude" <j schmude gmail com>
Sent: Sunday, August 09, 2009 12:12 AM
To: "orca-list" <orca-list gnome org>
Subject: [orca-list] Concerns about Orca's performance

> Hi everyone
> Well, I'd like to bring this issue up and see what comes of it. I've 
> noticed that, in most situations, Orca can sometimes be very laggy on  all 
> but high-performance desktops. Let me give a few examples (from my 
> netbook, but this can apply to almost any single core and lower- 
> performing dual core systems):
> 1. Bringing up the file open dialog in most applications happens  quickly, 
> but it can take up to two seconds for Orca to respond and  notify that the 
> dialog is up. Orca itself doesn't seem to lag the  desktop at all, but 
> there's a significant delay before I'm notified  about certain events. 
> This applies to any dialog, file open is the  quickest example however.
> 2. Sometimes when typing into text fields in scripted applications or 
> those based on Xul such as Firefox and Thunderbird, my typing is 
> significantly lagged. For example, I finish typing a sentence and yet 
> only two words have been typed, with the rest of the letters slowly 
> appearing one about every half second. If I attempt to backspace or 
> otherwise navigate, then each letter begins to be spoken along with  the 
> entire desktop slowing down until the typing has finished. Note  that I 
> have keyboard echo turned off completely.
> 3. When navigating any table for the first time, i.e. the first select 
> once a table has been focused, a very odd behavior starts and  continues 
> for a second or so. Essentially the first column of the  table gets 
> repeated over and over again while getting interrupted each  time. It's a 
> bit hard to explain, so I'll give an example of what I  here. In the file 
> open dialog, say I'm navigating to the item that is  called "Desktop," and 
> it is one down from where I have focused when  entering the table. This is 
> what I hear:
> Desktop, image image im im im image desktop today. The column focused 
> gets spoken but then gets interrupted by an image, which I'm assuming  is 
> an icon representing the file, and orca repeatedly interrupts  itself to 
> try and start reading the entire row and eventually settles  down. 
> Attempting to navigate while this is happening can cause a  number of odd 
> behaviors such as Orca crashes, queued keystrokes, or  desktop freeze.
>
> These are the three examples I can reproduce reliably of some of the 
> performance issues I've had with Orca for a long time (way before the 
> code refactor). These will be noticed more on a lower spec machine  than a 
> high-powered quad core, for example, and I'm really starting to  feel them 
> now on my netbook. HOwever, the os doesn't seem to make a  difference, be 
> it Opensolaris or Linux or FreeBSD, or even OS X. I've  also tried espeak, 
> festival and ibmtts (on Linux only for ibmtts  obviously) both with 
> gnome-speech and speech dispatcher and with every  audio system each 
> platform provides. I don't notice any difference, so  I've ruled out audio 
> or synthesizer-specific issues for the moment.
> I can provide debugging logs for each of these as I can easily  reproduce 
> them. I wasn't sure if there's already a bug tracking issues  such as 
> this, or if anyone else is having them. Is anyone else seeing  this? Do 
> braille users notice this type of lag too or is it specific  to speech? Is 
> there a bug tracking this or should a new one be opened?
> Thanks
>
>
>
>    The major difference between a thing that might go wrong and a  thing 
> that cannot possibly go wrong is that when a thing that cannot  possibly 
> go wrong goes wrong it usually turns out to be impossible to  get at or 
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>
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