[enhancement] The new website takes ages to load

[ancatmara]

Some pages on the new website, e.g. "Edit" or "Competitions I'm running" take more than 20 seconds to load! Uploading a competition bundle is even worse. Even registering a new user is extremely slow, which can be very annoying both for competition organisers and participants. It doesn't seem to depend on a browser or OS, so it would be great if you could check your database management for efficiency in the nearest future. Thanks!