So responsive Electron apps are certainly possible.
1. It takes nine times as long as Vim to open a minified JavaScript file, and then format it with Prettier: https://twitter.com/robenkleene/status/1285631026648276993
2. It takes 14 times as long to open an empty text file than BBEdit: https://twitter.com/robenkleene/status/1257724392458661889
Both of the above examples revolve around opening files for the first time, and I suspect a lot of the slowness I perceive is because I open a lot of different projects and source code files when I'm working, and this is a bad use of VS Code.
In practice, VS Code behaves more like a multi-language IDE than a text editor. Slow startup times are generally acceptable in IDEs because you're exchanging speed for power. A programmer should ideally be proficient in both an IDE and a text editor, because they're tools applicable to different problems. E.g., VS Code is a terrible choice for things like analyzing log output, formatting large files, testing isolated snippets of code, or working on source code files that aren't part of the same project. I find this to be a shame because VS Code is flexible enough that it would otherwise be excellent for all of these tasks if it were just more performant for some operations that it struggles with now.
I would agree that VS Code isn't the fastest thing when the editor is starting up, though I find it fine when started. I pretty much always have VS Code running so I don't find this a problem.
A lot of the overhead seems to come from making a new window (even though the app itself is already running), although notably most of the time spent in the Prettier example seems to be spent syntax highlighting the JavaScript. If you want to try a direct comparison of opening a file vs. a window, you can see the difference between opening a new file in an existing window (on Mac, `⌘N` / `File > New File`) or new window (on Mac, `⌥⌘N` / `File > New Window`). For me the latter is far slower than the former.
The whole point for then from the start was to not to repeat the Atom fiasco.
The entirety of the project was running around of making Webkit not suck.
They spent ennormous effort on that.
I think it’s only noticeable if you’ve used a native application for a while. It’s not enough to go from VSC to Sublime and back to VSC again for five minutes. Make an effort to use a native app for a week or a month and then switch back.
Emacs will sometimes become slower (especially remote emacs), but it will always buffer your keypresses and do them in the correct order.
Jupyter (for whatever reason), doesn't do this with the result that I ended up wanting to create a new code block, but that keypress got lost and then i end up ruining my original code block.
I 100% noticed the difference, and it was super frustrating (fortunately I left that job, and have managed to avoid Jupyter in the new gig).
VS Code also used to have far more native code earlier on in its development life, but seems to be transitioning a lot of it to WASM (paralleling the Node ecosystem as a whole moving a lot of performance heavy stuff from native NAPI plugins to WASM boxes; as one example: the major source maps support library moved from JS native to Rust to WASM compiled from Rust, IIRC).
