> Both VS Code and Atom use significant amounts of WebAssembly and low level libraries to achieve that performance. Atom has some internal data structures writ

> Both VS Code and Atom use significant amounts of WebAssembly and low level libraries to achieve that performance. Atom has some internal data structures written in C++. VSCode uses a native executable to do the file search, but no further low level magic is used to make it go fast. I don't think any of them are using WebAssembly yet.