Fast, All-in-One

Bun is a fast all-in-one JavaScript runtime. It includes a bundler, test runner, and native TypeScript support.

Performance

It’s incredibly fast. Startup times are near instant.

const server = Bun.serve({
port: 3000,
fetch(req) {
return new Response("Hello from Bun!");
},
});

Compatibility

It aims for complete Node.js compatibility, making migration easy.

Math Formula Compilation Test

Here is an inline formula: and a block formula: