Hi Vince,
if especially the restore context is slow (and remains slow after the db40 cleanup) it might be worth to ask support for the hot fix QCCR2A69386.
Slow expansion of integration restore object nodes in the GUI
https://softwaresupport.hpe.com/group/softwaresupport/search-result/-/facetsearch/document/KM02516300
Please use the Accept Solution button next to my post and assign a KUDO (thumbs up icon) if this works for you.
Regards,
Sebastian Koehler