We measure computer performance in the billions and trillions of ops per second. I'm sorry but if it an app takes 200ms to hide some comments, the app or the tech stack it's on is badly made.

> The web has complexity also of client/server with long delays and syncing client/server and DOM state, and http protocol. Desktop apps and game engines don’t have these problems.

Hugely multiplayer games consistently update at under 16ms.