Start up time is pretty random or me and this from a fresh boot. SInce upgrading yesterday it seems pretty fast but at times it has been as long as 5 minutes.
Now the bulk changing of metatdata seems to take forever.
I have a new I7 desktop coming this week to replace my current 2 year old quad core but am not sure it will make much of a difference a difference with calibre. Perhaps an SSD?
As Walt seemed to imply I would happily wait 15 minutes for it to start if it worked faster on the GUI/processing end. And of course I will wait anyway