I believe the loading time for Stellarium 0.13.0 on a cold start at 43 seconds with a full compliment of stars is rather excessive particularly with a limited splash screen. This I believe is caused by the checksum item.
Of course the next load once the checksum has been done is only 4 seconds.
However the changes made to the star catalogues mean that the catalogues are different for versions prior to 0.13.0 This means that changing between versions 0.12.4 and 0.13.0 mean that the checksum needs to be redone each time I change.
I need to run 0.12.4 (with sound compiled) as the main version because of the lack of audio and video in version 0.13.0. This I need to run for test purposes.