Slow apparition of the Open Dialog, solution?

FROM : Stéphane Sudre
DATE : Sun Jul 02 21:48:17 2006

I'm observing a very slow apparition of the Open Dialog for a Cocoa
document application. While this dialog is displayed relatively fast
for applications such as TextEdit, Safari or SubEthaEdit, in my case,
the dialog is slow to appear with this application (add 3 seconds at
least to the time it takes TextEdit to show the Open Dialog).

Since this is the AppKit which is dealing with the task of showing the
Open Dialog through the NSDocument stuff, I don't think the problem
comes from my code.

Is there anything that can be done with the "Document Types" settings
in the Info.plist file to speed things up? I didn't set a MIME Types,
could this help to add one? Could this be because the application is
built with gcc 3 and the 10.2.8 SDK?

For the record, the difference is less noticeable on a G4 400 MP with
Mac OS X 10.2.8 than on a G4 Quad with Mac OS X 10.4.7.