I've been looking into spacemacs, but I've found it to be a bit bloated vs. my personal config. It takes longer to start up, and sometimes just typing text in Insert Mode was sluggish (I imagine due to one of the autocomplete/typeahead libraries). That said, it has a lot of nice things and nice ideas. I'm undecided if I want to port my personal config to spacemacs, or just pull things out of spacemacs into my personal config.
I think I had sluggish behaviour sometime ago - but the updates to the config are happening at a very fast pace. I'm a pretty happy user. Also, the chat on https://gitter.im/syl20bnr/spacemacs is very active too, may be someone there could answer your specific questions (if you haven't asked already).
EDIT: you can also disable the packages you don't need, perhaps that's an option.
> EDIT: you can also disable the packages you don't need, perhaps that's an option.
I realize that, but it also means tracking down which thing is misbehaving because it's not immediately obvious.
I haven't given up on Spacemacs, but for the time being, I'll need to swap back and forth with my personal config so that I can get work done. At the very least, there are things that I like about it that I'll want to figure out and pull into my personal config.
There are also some things that could use a bit more documentation. For example, porting parts of my config over, I didn't realize that :nohlsearch was already bound to evil-search-persist-remove-all in the Spacemacs initialization.