Do you mean when you first open the software, or when you go to other pages? It does feel sluggish when you first open it. Also the RAM usage is not that good. I hope I can do some optimization on it.
( ls /Applications/.app 2>/dev/null ls /System/Applications/.app 2>/dev/null ls ~/Applications/*.app 2>/dev/null ) | wc -l 730
For me, it was really slow at the beginning, but it got much better after that. I'm not sure why, but this at least shows that there are still big problems with the current performance...