I don't know since when this has been like this, but now it seems Codeforces has exclusive delay policy for submission pages.

For example, try to open 286905356 286913842 286925333 286943910 287014608 these pages in 5 separate tabs (open one in each second). If it's not only me, it will go like this:

• 1st tab: opens immediately
• 2nd tab: waits for 10 seconds and then opens
• 3rd tab: waits for 20 seconds and then opens
• 4th, 5th tab: immediately goes to the "Oops! Probably Codeforces can't be reached right now or your Internet connection is broken." page

If you open the same submission page multiple times, the only difference is that all of them eventually opens with 10 seconds of delay, one after another, instead of going to the error page.

I honestly don't see the purpose of this overwhelming policy. Does opening a few submission pages really hurt the server that much? Of course, I am maybe a bit biased because it's extra stressing when you face this while trying to hack hundreds of submissions, but it's annoying for other usages, too.

For example, this applies not only for the whole submission page, but also for the submission view on popup windows. You can try clicking a submission number on my submission list, then the popup appears immediately. But if you press the '#' button on the top of the popup, it gets that 10 seconds of delay. Then if you press the 'Click to see test details' button on the bottom of the page, it gets another 10 seconds of delay! Furthermore, if you're trying to hack a submission, opening the hacking page also gets additional delay. If you accidentally close a tab (or a popup) and try to open it again, you get 10 seconds of delay.

Why do we need to wait for every consecutive action regarding the submissions? Doesn't it need only to block real spam actions, such as auto scrapping every submission?