[Cocoa-sharp] Performance of UI

[David Jehring]

Edward,

That is very helpful information and indicates that a fix should be
possible. Have you replaced all of the interop classes, if not which ones ?

David 


On 07/03/2008 13:37, "Edward Carr" <ecarr at lightshipinc.com> wrote:

> The performance problem is not a Leopard only issue. We have the same
> problem when running under 10.3, 10.4 and 10.5. It's a fundamental issue
> with the interop classes. I've replaced just the interop classes with ones
> from an initial release when there was stackpadding and voodoo magic going
> on; I forget the actual release, but I believe it is the source that was
> used to build the cocoa-sharp that is still being released with Mono today.
> This original (but messy) code performs much better than the current code.
> 
> Edward Carr
> 
> -----Original Message-----
> From: cocoa-sharp-bounces at lists.ximian.com
> [mailto:cocoa-sharp-bounces at lists.ximian.com] On Behalf Of marc hoffman
> Sent: Friday, March 07, 2008 5:10 AM
> To: David Jehring
> Cc: Cocoa-sharp at lists.ximian.com
> Subject: Re: [Cocoa-sharp] Performance of UI
> 
> David,
> 
> i too am seeing this, and it *seems* to be a leopard problem only. i
> remember speed being just fine when i first played with Cocoa# on
> 10.4, last September/October, then when i switched to leopard things
> turned bad (i posted at the time). i've seen some improvements in
> general UI since 1.2.6 (i think), for example my
> MethiodHeaderConverter works fine. but even a simple app using a grid
> (such as http://www.remobjects.com?da35 slows to a crawl - and it's
> NOT the callbacks to get data or coloring info 0 its just as slow
> without).
> 
> one major culprit, i think, is the new Toolbar. it might sound silly,
> but in my first tests back when i switched to Leopard, i got the
> impression that the simple presence of a toolbar changed speed. drop
> an textedit - all is fine. drop a toolbar too, and typing got
> reaaaallllllyyyyy slloooowwww, and Mono.exe ate a full CPU, according
> to "top" while you did.
> 
> Yours,
> 
> marc hoffman
> 
> RemObjects Software
> The Infrastructure Company
> http://www.remobjects.com
> 
> 
> On Mar 7, 2008, at 10:51 AM, David Jehring wrote:
> 
>> Thanks Edward, it is reassuring to hear that it is a known issue but
>> somewhat disappointing that such a fundamental problem has existed
>> for so long with no sign of it being addressed. Following the
>> initial deafeningly silent response to my post I have abandoned
>> cocoa-sharp and gone back to the somewhat more laborious task of
>> porting my clients to pure obj-c. It seems a shame but I cannot risk
>> the issue not being resolved and ending up with unusable applications.
>> 
>> David
>> 
>> 
>> On 06/03/2008 21:31, "Edward Carr" <ecarr at lightshipinc.com> wrote:
>> 
>>> David,
>>> 
>>> I have seen the same issue that you are seeing. We actually use a
>>> previous version of Cocoa-sharp, which performs 1000% better. I
>>> have raised this issue before in the past, but no one seemed to
>>> acknowledge it. With the previous version, we were able to put
>>> together a great performing product.
>>> 
>>> Edward Carr
>>> 
>>> From: cocoa-sharp-bounces at lists.ximian.com
> [mailto:cocoa-sharp-bounces at lists.ximian.com
>>> ] On Behalf Of David Jehring
>>> Sent: Saturday, March 01, 2008 4:46 AM
>>> To: Cocoa-sharp at lists.ximian.com
>>> Subject: [Cocoa-sharp] Performance of UI
>>> 
>>> Having got to grips with writing cocoa sharp applications over the
>>> past couple of weeks I am experiencing a significant problem of UI
>>> performance, as noted in another posting earlier this week. Even a
>>> simple 'Hello world' application shows significant screen lag when
>>> resizing and consumes disproportionate CPU time, once you add a
>>> couple of views to a window resizing can consume 90% of CPU time.
>>> Typing into a text field with an event attached can produce a lag
>>> of a second or so between characters. As with all open source
>>> software when you find these things there is always a strong
>>> possibility that this is to do with local configuration, but in
>>> addition to the posting this week I note a thread called
>>> 'Performance on Leopard' last year discussing this issue with no
>>> conclusion. Are others experiencing this ? If so is there anyone
>>> with insight as to what the underlying issue is and what is
>>> required to resolve it. I see cocoa sharp as the most sensible way
>>> to bring my web service based client applications from Windows to
>>> OS X and would be very happy to contribute to the open source
>>> effort, however this issue would seem to be a bit of a showstopper.
>>> 
>>> David
>>> 
>>> Dr David Jehring
>>> 
>>> 
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