The Black Simmer

I have like 30 gigs of CC in my game and that search will pause for a few seconds even on a high end computer.  Only suggestion I can give is to maybe clean out some of your CC furniture/Clutter.  The easiest way to do this is to start on an empty lot and start placing everything you don't use/want anymore.  Save the lot.  Then use The Sims 4 Tray Importer from here: http://luniversims.com/files/file/73-sims-4-tray-importer/  Select the lot from the gallery in the program and it will list all the CC you placed which makes it easier to remove from your mods directory.  I believe Mira also made a video showing how to do this also.