Fastify is a modern alternative to Express.js.
Both are web frameworks for Node.js, but Fastify is designed from the ground up to be:
🔥 Faster, Lighter, and More Scalable than Express
| Feature | Fastify | Express.js |
| 🚀 Performance | Much faster (measured benchmarks) | Slower due to older architecture |
| 🧱 Built-in Schema | Yes (JSON Schema validation) | No (manual validation or middleware) |
| 💡 Plugin system | Modular and encapsulated | Global app-level plugins |
| 📦 TypeScript | First-class support | Partial, needs community types |
| 🧪 Testing | Lightweight and fast | Works well, but slower in comparison |
| ⚙️ Routing | Similar to Express (easy switch) | Very established and mature |
💬 Use Fastify if:
You care about speed or scalability
You want better TypeScript support
You're building microservices or modern APIs
🛠️ Example: Express vs Fastify
Express:
const express = require('express');
const app = express();
app.get('/ping', (req, res) => {
res.send('pong');
});
app.listen(3000);
Fastify:
const Fastify = require('fastify');
const app = Fastify();
app.get('/ping', async (req, reply) => {
return 'pong';
});
app.listen({ port: 3000 });
So yeah — Fastify can replace Express in most modern apps, and is especially great when you're building high-performance real-time services like your chat microservice.
