Is there any way I could reproduce it here? If you find some test case with e.g. some open source project I could download and test the tag generation time, I'm sure I can get to the same times as GeanyPrj - there's no reason why GProject should be slower.
Jiri,
I seem to have missed this request ;)
I just tried to reproduce my enormous load-times by starting with an empty Drupal 7 download and adding modules and current subsites/projects. With every extra site I copied, Geany/Gprojects takes exponentially long to open until we reach the 8 minute mark again.
I work on several projects each week but I'll guess I have to delete as much files as possible to be able to start/close Geany within a couple of minutes, which still seems rather long for my 1-year-old desktop.
-H-