Why I Choose Fastify Over ExpressJs (and Never Looked Back)?

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When I started Backend dev, ExpressJS was only option that was available to me as every tutorial and boilerplate code was about ExpressJS.

But as I got deeper into performance, structure and real scalability ExpressJS started to feel outdated.

That's when I met Fastify And Honestly This is one of the best decision with No Regrets I have ever made.

1. Scalability:


Fastify is designed and built for performance at scale. It handles 10x more load than ExpressJS thanks to it's optimised core and low overhead.

2. Speed:


Fastify isn't just called fast, it is fast.

Benchmark Test:
Fastify: 60k/sec
ExpressJS: 15k/sec

3. Plugin System:


My favourite thing in fastify is their encapsulated plugin structure. Fastify gives an encapsulated space for writing logics, routes, schemas and many more thing because of this we can structure our api in more modular and safer way. In this way we are not exposing the credentials in global space and making a global middleware chaos.

4. Schema:


Fastify forces you to define req/res schemas resulting:
1. Safer Api
2. Self Documented Routes
3. Better Dev Experience with less guess work

5. Typescript Support:


We don't have to use any everywhere in backend now as Fastify is natively Typescript supported.

Still thinking?
I know ExpressJS is simple and easy but Let me show you the drawbacks of ExpressJS
1. Slower Performance
2. No built-in validation
3. No structure our of the box
4. Middleware Hell
5. Manual Everything

There are many more features in Fastify like: prebuilt plugin libraries, active community, responsive and future proof atleast for next 5 years.


Final Thought
Fastify isn’t just a faster Express it’s a better engineered backend framework.

If you care about performance, scalability, safety, and dev sanity…
Fastify is the Best choice. No regrets.

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