We have that feature! Shift + Esc brings up a detailed Task Manager with all kinds of statistics! You can right click on the header for even more information. Pretty useful at times 🙂
Yeah, embedding takes up quite a few resources on the client side. The music thread is using 125MB! Outside of limiting how much stuff to post, the best solution would be to limit how much of the content is embedded with the others just showing up as links. Not ideal but does help to a large degree