Scheduler - bad performance when dealing with large data Declined - Not Valid

Week timeline view grouped by resources has in one single week:

- 250 + resources

- 620 + appointments

I have made this code-sandbox to try to replicate what we have in production. Bare in mind that I did  not replicate all the logic for sorting and filtering resources and appointments or other levels of grouping that we have, which also adds another layer of complexity in our production application. So below information about times almost doubles on our end.

Every operation on the grid takes 6+ seconds to complete (add, delete, edit, drag, resize). Apart that it takes a very long time to complete the operations are not asynchronous, which makes the page fully un-usable for every action performed. Even a simple action as a window resize is causing the same page blocking issue.

As of now this is a show stopper for us. Please take this into serious consideration and provide:

- a fix

or

- an alternative implementation approach, that will be more performant

Thank you for your quick response.