Very Slow PM editor after updating to 1.85 or 1.9

[kavery]

I'm having a problem with this using different versions.. With Unity 2017.4. I finally got PM to update to 1.85 and 1.9 but in both versions the editor runs very slowly for large fsms. It might take 30 seconds to make a simple change.

It also takes a really long time to engage play mode in editor and exiting play mode.

I was using 1.7xx before with no problems.

I tried all of the preference options.   

I should mention I was also using 5.3.4 with 1.7xx.

[Alex Chouls]

You tried turning off Preferences > Error Checker > Enable Realtime Error Checker?

Can you share your project? If so, please PM me a download link.