Bun's 110K RPS Smash: Node & Deno Left in Dust

Hey devs, imagine slashing your server costs in half just by swapping your runtime. That's the wild promise from a fresh Snyk benchmark where Bun crushes 110,000 requests per second (RPS) with 10 concurrent connections—Node.js limps to 60,000, and Deno hits 67,000. This isn't some lab toy; it's a serious contender for high-traffic APIs where every instance counts.

Picture this: You're building a chat app or a real-time dashboard. At scale, Bun means fewer AWS bills and happier ops teams. Node's been our trusty steed for years, Deno's the secure hipster pick, but Bun? It's the speed demon written in Zig, rewriting the rules.

TL;DR: Bun Wins Throughput

• Bun: 110K RPS – Fewer servers, lower costs.
• Node.js: 60K RPS – Reliable but resource-hungry.
• Deno: 67K RPS – Solid, but Bun laps it.

Why care? In cloud world, throughput = $$$. Bun's edge shines in production loads, like handling API floods without spinning up extra machines.

The Benchmark Breakdown

Snyk's test hammered a simple HTTP server with 10 connections. Bun flew at 110K RPS, Node at 60K, Deno 67K. Other benches echo this: BetterStack clocked Bun at 52K RPS with Express (vs Node's 13K, Deno's 22K). YouTube deep-dives show Bun dominating latency, CPU, and memory too—especially with optimized drivers like Postgres.

Bun's secret sauce? It's built for speed from the ground up—no V8 baggage like Node, no Deno overhead. Result: At 1M RPS needed? Bun needs ~9 instances vs Node's 17. Pure savings.

Why This Matters for You

Stuck on Node for that massive npm lib? Bun's got npm compat + its own ultra-fast package manager. Deno's great for security sandboxes, but if throughput's your bottleneck—like microservices or edge APIs—Bun delivers fundamental tier shift.

Use case 1: High-traffic REST API. Swap Node for Bun, watch your Kubernetes pods shrink. Use case 2: Serverless on edge. Bun's cold starts are snappier, perfect for Vercel/Netlify killers. Use case 3: Dev tools. Bun's bundler/test runner means faster iteration—no more waiting on webpack.

Code Time: See the Speed Yourself

Let's build a dead-simple "Hello World" server in each. Fire up your terminal and benchmark with wrk or autocannon (install via npm).

1. Node.js (Express)

npm init -y && npm i express
// server.js
const express = require('express');
const app = express();
 
app.get('/', (req, res) => res.send('Hello Node!'));
 
app.listen(3000, () => console.log('Node on 3000'));

Run: node server.js. Expect ~60K RPS max.

2. Bun (Native, No Extra Deps)

bun init -y
bun add -d @bun/server  # Wait, Bun has built-in! But for parity:
// server.js
import { serve } from 'bun';
 
serve({
  port: 3000,
  fetch(req) {
    return new Response('Hello Bun!');
  },
});
console.log('Bun on 3000');

Run: bun server.js. Boom—110K RPS vibes.

3. Deno Quickie

deno run --allow-net server.ts
// server.ts
Deno.serve({ port: 3000 }, (req) => {
  return new Response('Hello Deno!');
});
console.log('Deno on 3000');

Solid ~67K RPS, with TS out-the-box.

Pro tip: Benchmark your own app! npm i -g autocannon then autocannon -c 10 -d 30 http://localhost:3000. Watch Bun smoke 'em.

Real Talk: Bun's Not Perfect (Yet)

Bun's young—ecosystem's growing, but Node's npm empire is unbeatable for legacy stuff. Deno wins on security perms. But for greenfield perf beasts? Bun.

Try It Yourself

Grab Bun (curl -fsSL https://bun.sh/install | bash), clone a Node repo, bun install, bun run dev. Feel the warp speed. Drop your RPS scores in comments—what's your killer app?

Your APIs deserve better. Bun's here to deliver. 🚀