1, 2, 3... Fastify!

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In my journey through nodeland, I always wonder about the cost of my abstractions.


I started a journey to write an HTTP framework with extremely low overhead, and Fastify was born. With its ability to reach an astonishing 90k requests/sec, Fastify can halve your cloud server bill.


In this talk, I will walk you through the basics of the framework: how to route requests, write tests, and use the plugin system.

Matteo Collina
Matteo Collina
36 min
18 Jun, 2021

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Video Summary and Transcription

Fastify is a web framework that started in 2016 and is easy to use. It supports logging, splitting the app into separate files, and auto-loading routes. Fastify also provides authentication and user login functionality. It differs from other frameworks by fully supporting Async Await and the latest JavaScript features. Matteo Collina, the speaker, prefers Vim and T-Max as his IDE and enjoys Italian pizza as his comfort food.

Available in Español: 1, 2, 3... ¡Fastify!

1. Introduction to Fastify

Short description:

I am Matteo Collina, here to talk about Fastify. Fastify is a web framework started in 2016. Install it with NPM. Easy to use. Let's build a simple app. Import Fastify. Use Node 14. Create app. Listen on port 3000. Server started. Route not found. No logs.

Everyone, I am Matteo Collina. And I'm here today to talk to you about Fastify. Please take a moment to follow me on Twitter, at Matteo Collina. I tweet about Node.js development and a bunch of other things. So yeah, maybe you can find it interesting.

Anyway, we are here to talk about Fastify. This is, you know, we are all remote, it's all distributed around the globe. So this talk, I'm going to try something that I normally don't try on stage. So maybe let's see how it goes. So first of all, Fastify is a web framework that myself and Thomas De La Vedo started back in 2016. And now it's coming up to be the major version 3, which is going to be released soon-ish.

Anyway, how do you install it? NPM install Fastify. And it's actually very easy to use. However, we are not going to talk a lot about it, but we are going to actually use it to actually build a very, very simple app. So first of all, we can just start by, you know, having our own server and we can import Fastify. Oh, by the way, folks, I am going to use a Node 14. Why? Because I want to use the new ESM features of of Node Core. So, you know, so that's that's what you're going to use. So we can do import Fastify from Fastify. Then I can create my app. And and then I can do app.listen on port 3000. Whoa. OK. So maybe this server. Oh, and VMUse 14. Hey, so this server has started. And then I can curl it and then, oh, well, route not found. Yeah, we didn't add any. So that makes total sense. However, we also if you look at it, it also didn't log anything.

2. Adding a Logger

Short description:

We can add a logger by setting logger true. In development, set pretty print true for nicer output. The logger logs twice for each request, when it comes in and when it comes out.

So maybe we just want to add a little bit of a logger here. So which is probably useful. So we can do logger true and we can start it back. Oh, now it says server listening. It logs in new line. Delimited JSON, it use another library called Pinot to log. Still, we are getting some output out of it. However, if we are in development, what you can actually do is do pretty print true only in development. And if we do this, we will get a little bit more nicer output out of it. Note that it just logs twice for each request, logs when a request comes in and when a request comes out. Pretty nice and handy.

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