Delete all the files from collection that aren't included in playlists

Hi! I need help from you guys :)

Is there any workaround to delete all the files from the collection that aren't included in my playlists ?

I want this because i have around 4000 files in the collection...and only ~500 files in the playlists. 

Last night i wanted to re-analyse my files from playlists and it took very very long because i re-analyzed 4000 files instead of only 500 :) (also my laptop was almost on fire because of the CPU working for that long)

Also the solution to go in every playlist and re-analyze the tracks inside that particular playlist is also very time consuming because i have a lot of playlists.

If you don't have any solution maybe the team can develop a feature to make this happen (maybe a column tag that show if a track is added or not into a playlists. also i've seen that somebody else asked for this feature in the past, here on forum)

Thank you and waiting for your help!