Speed up search by prebuilding and saving indexes

Good Afternoon,

In my experience the app is a bit sluggish at startup especially on mobile, it seems to me that it builds a search index in the background. Would it be possible to save the index and reload it automatically at startup to avoid having to rebuild it everytime?
given the fact that it only needs to get updates whenever the server sync up new modifications this could enhance significantly the responsiveness of the app at startup time.