I have written some applications using Tk.
When displaying dialogs, the window appears immediately, but the display of the contents is delayed about a second.

I tested this on Linux using KDE, KDE2 and enlightenment as windowmanagers.

A test with Perl/Tk running on AIX and Exceed running on a NT machine showed no delay.

You can test it by yourself with: 

perl -MTk -e 'tkinit->Dialog()->Show'

[download]
This will bring up a dialog window with an 'Ok' button. The display of the button will be delayed on KDE and enlightenment.

Any idea what's causing the delay and what you can do against it?

In reply to Why is the display of the contents of a TK Dialog delayed by busunsl

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