Performance issues with (very) large leaderboards #84
Description
While improving #70 (large leaderboard) UI/UX, I found that it also can performa not too great. Takes 3ish seconds to do its thing. See for example this performance breakdown on Chrome for my (rather beefy) PC:
Would be nice to see if this can be cut down a bit. Perhaps there's just some silly mistakes or things to improve? Haven't investigated yet.