scrivener taking several minutes to load

Hi- am on the final draft of my book and getting very frustrated with the time it takes scrivener to load (we’re talking up to 10 minutes!) It seems to be getting worse and worse and from the forum see this is not an uncommon problem.
I’ve tried suspending dropbox sync but to no avail. This is really wasting time on my tight deadline. Can anyone help?
(I should add the slow bit always happens at the "rebuilding search indexes stage)

Do you mean Scrivener itself, only the app, or do you mean loading a project?