I honestly used Atom and Code prior to deciding to try Sublime. My experience has been the same as these results. Sublime is much quicker than either one. I do still like Vim (Neovim to be specific), but right or wrong that isn't what I am comparing to Sublime. I usually just compare Sublime, Code and Atom. Of which Sublime wins by a landslide (which you can more than likely blame on Electron).
Code is not a fast editor, and you're right that this is likely linked to Electron, but I do think lumping it in with Atom is possibly turning many off it too quickly. The gap in performance between Atom and Code is phenomenal.
It's also worth remarking on that some of the treatment of these two in this article is a little odd. Atom is excluded from a lot of tests completely, and Code is particularly penalised in one test for incomplete highlighting (where it's noted it completely the functional task "quickly").
In day-to-day work, I still choose VS code over Sublime. The plugins are actively maintained and simply better. Go, eslint, tslint plugins specifically. Most of the files I edit are less than a few hundreds line of code and that's a good thing. The difference in speed for my use is not noticeable.
When I have to look at a large log file, I just use vim or grep with context.
When I thought even Sublime isn't fast enough with today's hardware tech, People are cheering Atom and Code as being very fast. There are Editor faster then Sublime, but none of them as feature rich.
I use Code for working in Javascript and have been pretty happy with it. It does code introspection better out of the box and is fast enough. But it's resource hungry enough that I can't just keep it open in the background as my "standard text editor."
