[badsectoracula]

> Open or save file Dialog is just the worst in all regards.

I guess the author never used any Gtk+ 3 file dialog :-P. Honestly the fact that you can perform actual file manipulation, use shell extensions (e.g. version control overlay icons), etc put it above pretty much every other file dialog except perhaps KDE's (but AFAIK even that doesn't have all the functionality you'd see in a regular file manager window).

Having said that, yes, it is unnecessarily slow and not because of the features above since some applications use older versions of the dialog that still have these features but appear instantly. Not sure why the "full fledged" version is slow.