J., thanks for this information. It looks very much like the cause of the problem. I wonder why purely managed applications do not suffer from this issue though. Of course, I'm using .NET framework 1.1.
As I has already mentioned, my own googling finished with no success just like yours. Any further comments / ideas? Thanks, Dmitry ----- Original Message ----- From: "J. Merrill" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, April 01, 2004 3:38 AM Subject: Re: [ADVANCED-DOTNET] GC problem in ShowDialog > What version of the framework? (Likely 1.1 I guess if you're using VS.NET 2003.) > > I cannot find it now, but I'm rather sure that I saw a reference somewhere on the net to what was described as a bug, that in some circumstance (it might have been "in a modal dialog") a GC is triggered every time some very common Windows internal action (a Paint? a Refresh?) occurs. I had not, at the time, tried to confirm the correctness of the assertion that this bug at some time existed. > > If there were multiple GCs for each ShowDialog, that would match what you're seeing. A single GC would normally not take much time, even when VS.NET is running. > > I googled without success in locating what I'm sure I saw. Hopefully someone else can say something other than "you must be crazy" <g>. > > HTH > > At 05:33 AM 3/31/2004, Dmitry Shaporenkov wrote > >Hi, > > > >in my application (that is indeed an add-in for VS.NET 2003) I observe a > >somewhat odd problem: all modal forms appear on the screen very slowly. > >Performance counters say that the garbage collection occurs each time > >ShowDialog is called. Frequently, GC in ShowDialog happens even in older > >generations, so each modal form takes several seconds to appear! > >Interestingly, when the same forms are shown modeless, GC is not triggered. > >I reproduced this effect quite stably. Moreover, the effect seems to bear no > >relation to the overall memory usage of the VS.NET application that is not > >very high on small projects (in fact, CLR profiler reports only 8 Mb in > >managed heap, and modal forms are still very slow!), and the machine on > >which I tested it exhibits 1 Gb RAM. > > > >So, my question is: what ShowDialog does that triggers GC? > > > >Googl'ing did not shed light on the issue. > > > > > >Any ideas on the origin of the problem will be greatly appreaciated. > > > >Thanks in advance, > >Dmitry > > > J. Merrill / Analytical Software Corp > > =================================== > This list is hosted by DevelopMentorŪ http://www.develop.com > Some .NET courses you may be interested in: > > NEW! Guerrilla ASP.NET, 17 May 2004, in Los Angeles > http://www.develop.com/courses/gaspdotnetls > > View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentorŪ http://www.develop.com Some .NET courses you may be interested in: NEW! Guerrilla ASP.NET, 17 May 2004, in Los Angeles http://www.develop.com/courses/gaspdotnetls View archives and manage your subscription(s) at http://discuss.develop.com
