When I try to load EN:Intercollegiate_sports_team_champions in the 2017Editor the timing stats between the first to last requests have been {30,33,33,35,40} seconds. The editor is theoretically accepting input, however the actual time elapsed is OVER ONE HUNDRED SECONDS before I can actually get one new character to show up. And when I do type one character, the CPU thread chokes at maximum for over a minute. Then I can type one more character, and the browser goes unresponsive for another minute. Every character locks up the browser for over a minute.
On a smaller article such as EN:New_York_(state) the editor theoretically works, however it's still incapable of realtime response. It can't keep up with even moderate typing speed. Nothing shows up as I type, until the screen updates for a half-dozen keypresses at a time. That is not usable.