We have updated our Community Code of Conduct. Please read through the new rules for the forum that are an integral part of Paradox Interactive’s User Agreement.
You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
I have noticed it as well, and have passed it on to our internal forums. You can optimize it slightly by having the game paused while browsing a large dynasty tree.