I've been having horrible problems with High Sierra. In 10.13.0, performance was all right, but I was getting hard-locks at least once a day at work. I was desperate for a fix, so I decided to give the 10.13.1 beta a whirl. It's been a nightmare. Graphical performance took a HUGE dive for me. I wasn't experiencing hard-locks anymore, but the performance got so bad that it was affecting my productivity extremely negatively. If I even _thought_ about running anything Chromium-based, it chugged hard.
I ended up rolling a clean install of 10.12.6 on a separate partition and everything is fine. Installed beta 5 on my High Sierra partition today and nothing's changed. Truly hope this gets ironed out before a final release.
edit: Late 2013 rMBP w/16GB of RAM