? I've used Sublime to open ~10GB files. It's often the only thing that'll open them. They pride themselves on that ability (among others).

Yeah, sublime is astonishingly fast. Obviously much better than electron-based editors.

If it’s plain text maybe but I’ve found as soon as a syntax highlighter or any parser has to run on it it locks up.

2-3mb JS files brought it to a crawl, and I didn’t have many plugins btw.