Same here, in a legacy code base with millions of lines of duplicated code that I unfortunately had to work on, IntelliJ would not even let me type, it just froze up all the time. Atom also sucked, fuzzy finder locked up the UI for 10 minutes. VSCode I can cold boot & start using the fuzzy finder, no issues. Feels like vim, in that it "just works". So performance is more dependent on what the software is doing, not what UI toolkit / runtime it uses. VSCode is faster on this codebase because it seems to not block editing due to a search index, like the others -- which has nothing to do with Electron vs Java.