Yeah, I mean if you can show us some information (like addons displaying it using cpu while idling and stuff) then we can take a further look at it. But I was running a lot of various tests last night and didn't see anything.
We did notice the "fps lag" was increasing as you learned items and that's when we were testing. From what I saw it looks like Blizzard changed something in the patch and might be causing issues? As a lot of addons "fps lag" was increasing each time the addon was called (not just ours, but others too). While there are some places we are looking into optimizations for different calls and such there's not much we can do if it's something to do on Blizzard's end.
I know some people feel worried about load time, but it doesn't add much to the load screen (if you use a non-ssd then maybe? I haven't tested it on that), but the tradeoff is that you don't have to call up the database every single time you hover over an item so it lessens the load while actually playing.