Velt

Your TypeScript, compiled to a native executable. Rust-class speed, every core, no runtime.

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Velt compiles TypeScript ahead of time to machine code through LLVM. It is not a JavaScript engine and doesn’t wrap one: there is no interpreter, no JIT warm-up, no garbage collector and no single-threaded event loop. Your program is a native binary that uses every core of the machine.

// src/main.vlt of a package made with `velt new hello --template api`
// (its package.vlt depends on the http-server package): `velt run`
import { serve } from "http-server";

interface User {
  id: string;
  name: string;
}

const users = new Map<string, User>();
users.set("42", { id: "42", name: "Ada" });

await serve({ port: 8080 }, async (req: Request): Promise<Response> => {
  const id = new URL(req.url).searchParams.get("id") ?? "";
  const user = users.get(id);
  if…