First of all, I want to thank you for your work. I have developed idle games before that didn't even come close to the popularity of this one, and yet I still felt a lot of pressure to deliver more content and fix mistakes, so I wanted to say that I appreciate what you are doing.
Now for the bad news, I'm still seeing ~2300x actual on the 5000x speed, with Dedicated Worker. For reference, I'm Seeking the Mightiest Foes on the Deep Dual Wildernesses, working my way to getting all the techniques and leveling them to TL 100. If it would help, I can provide you with my save or give more details on the exact progression point.
Viewing post in Performance Recovery Update and an Apology comments
It's been a lot of work but I'm overall enjoying myself so far. I appreciate the acknowledgement, it really can be a slog at times.
I don't require the save at this point, if you could tell me your specs though here and which browser you are using I can artificially create an environment close to your system and see what is going on.