As a former Premiere Pro user who switched to Final Cut Pro, I can say that FCP is much faster, especially in rendering, However, you can further tweak the software to make your video editing life even better.
These are the 5 steps:
1. Display Quality
2. Optimized Media
3. Proxy Media
4. Shorter Connected Clips
5. Competing Applications
YouTuber LPTGuy explains how you can do just that in the video below: