Yup. VSCode is really fast and memory-frugal for an Electron application of that complexity. Likewise, Gnome has proven that you can write entire UIs in Javasc

Yup. VSCode is really fast and memory-frugal for an Electron application of that complexity. Likewise, Gnome has proven that you can write entire UIs in Javascript and have them be quite performant. Electron (well, Node is a big sub-culprit) and Javascript in general just make it really easy to create a slow, bloated application.