To make lightroom run faster there are several steps you can take to optimize things. The first thing you’ll need to check is how much free space you have available on your hard drive you’re running lightroom on. If it’s over half full, this can hinder the performance of lightroom. Either clear some space, or get an external hard drive if this is the case.
Next check the amount of ram you’re using. The more the better as this handles a lot of the processing things that lightroom does. With more ram it has an easier time moving around.
Next Make sure that you render the 1:1 previews either during the import phase or after importing images into Lightroom. It doesn’t happen automatically and this will greatly speed up everything in Lightroom.
Finally optimize your catalog by clicking on file then optimize catalog.
Click the optimize button.
This will optimize your catalog. These few things should make lightroom run faster.