Problem after update to MyBB 1.8.6 (from 1.8.5)

[Eldenroot]

Destoy666 - OK, but same problem on profi paid webhosting - live forum with over 3500 users - no problem on MyBB 1.8.5, after updating to 1.8.6 - really slow, unresponsible

s there any way how to revert back to 1.8.5? I cannot use 1.8.6

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OK, so I created 2 MyBB forums on the same webhost and same domain with same settings:

- first - fresh MyBB 1.8.5 install - http://testingpage.4fan.cz/185
- second - fresh MyBB 1.8.5 install updated to MyBB 1.8.6 - http://testingpage.4fan.cz/186

As I said before - on MyBB 1.8.6 huge loading times, especially in a plugin tab and many 405 error; also slow loading of posts and attachments

On MyBB 1.8.5 - no problems

Here is the screenshot from footer debug + I can provide username + pw for you

This is a fresh install, on large forums is the difference in loading time much more bigger (for me - 120ms vs 47 seconds after update)