I know codeforces api is unabled while a contest is running because of performance issues but wouldn't it be better if it was enabled about an hour after a contest starts? Codeforces api's are widely used and performance issues can be tolerated at that moment.
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MikeMirzayanov
I think it's better if they use load balancer and kinda give a dedicated server (smaller one) for api calls during the contest (or rating roll back) so it wouldn't lag much. And in other cases the smaller one along with other servers can be used for everything like it's being done now I guess!