Bun is a JavaScript runtime with Web APIs like fetch, WebSocket, and several
more builtin. bun embeds JavaScriptCore, which tends to be faster and more
memory efficient than more popular engines like V8 (though harder to embed).
It is meant to make the whole JavaScript development even faster. It is an
all-batteries included tooling. It does not just speed compilation and parsing
but provides its dependency manager tooling and bundling.