The most distinctive one is when you start typing a chord- it can take up to a good second to populate the command list. Compare this to vscodes command palette which is instant.

I admit that perhaps there is a configurable lag built in (it would make sense to do so) and while there are other examples that I know bother me, this is the one that jumped out straight away. I'd have to dig back in to have more specifics.

I'm not sure what chord menu you mean. :(. I /think/ you are describing "echo-keystrokes", which defaults to one second.

M-x is basically instant for me, though. So, not sure why anything like that would be slow.

Not OP, but for me adding or deleting a character in the middle of a paragraph in a latex doc hangs for maybe .5s or more, often. This is a fairly new phenomenon, never happened 2+ years ago.

That sounds broken. :(

Good luck getting it fixed, if you are still trying. A basic profiler-start, type, profiler-stop, profiler-report can probably pay the blame easily.