I do have performance issues here in the UK, the editor IS very laggy. There’s a very noticeable delay when moving around Editor X in general, but particularly when using the editor itself. Pages are very slow to change, page & element changes work in slow time too.
But I put up with it as changes can be made & do update eventually, just not in real time. And those changes are also quite quick to appear when published.
I probably wouldn’t have talked about this but why I know that there is some sort of issue is when I watch Editor X tutorials - both by the EdX team & 3rd party - where the hosts are zipping around the making changes and they don’t seem to experience any lag issues at all.
I have a good IT infrastructure / laptop etc, and have cleared cache etc but nothing I do seems to improve things at all. I suspect the issue might be that the performance of the local infrastructure I’m being served EdX files & content from isn’t that great, so there probably not much I can do about it.
Last, this laggyness gets worse for me after 2pm UK time, so it may be something to do with increased traffic as the US comes online…