Fast and low overhead web framework, for Node.js
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Latest commit 46cbd8f Jan 17, 2018 @mcollina mcollina Merge pull request #674 from fastify/no-ajv-option
Completely remove any form of AJV configuration

README.md

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An efficient server implies a lower cost of the infrastructure, a better responsiveness under load and happy users. How can you efficiently handle the resources of your server, knowing that you are serving the highest number of requests as possible, without sacrificing security validations and handy development?

Enter Fastify. Fastify is a web framework highly focused on providing the best developer experience with the least overhead and a powerful plugin architecture. It is inspired by Hapi and Express and as far as we know, it is one of the fastest web frameworks in town.

Install

npm i fastify --save

Example

// Require the framework and instantiate it
const fastify = require('fastify')()

// Declare a route
fastify.get('/', function (request, reply) {
  reply.send({ hello: 'world' })
})

// Run the server!
fastify.listen(3000, function (err) {
  if (err) throw err
  console.log(`server listening on ${fastify.server.address().port}`)
})

with async-await:

const fastify = require('fastify')()

fastify.get('/', async (request, reply) => {
  reply.type('applicationhttps://github.com/json').code(200)
  return { hello: 'world' }
})

fastify.listen(3000, function (err) {
  if (err) throw err
  console.log(`server listening on ${fastify.server.address().port}`)
})

Do you want to know more? Head to the Getting Started.

Core features

  • Highly performant: as far as we know, Fastify is one of the fastest web frameworks in town, depending on the code complexity we can serve up to 30 thousand requests per second.
  • Extendible: Fastify is fully extensible via its hooks, plugins and decorators.
  • Schema based: even if it is not mandatory we recommend to use JSON Schema to validate your routes and serialize your outputs, internally Fastify compiles the schema in a highly performant function.
  • Logging: logs are extremely important but are costly; we chose the best logger to almost remove this cost, Pino!
  • Developer friendly: the framework is built to be very expressive and help the developer in their daily use, without sacrificing performance and security.

Benchmarks

Machine: Intel Xeon E5-2686 v4 @ 2.30GHz (4 cores, 8 threads), 16GiB RAM (Amazon EC2 m4.xlarge)

Method:: autocannon -c 100 -d 40 -p 10 localhost:3000 * 2, taking the second average

Framework Version Router? Requests/sec
hapi 17.1.1 19,824
Express 4.16.2 20,690
total.js 2.9.1 21,949
Restify 6.3.4 22,989
Koa (koa-router)  2.4.1 (koa-router@7.3.0) 25,017
take-five 1.3.4 24,540
Koa 2.4.1 25,017
micro (micro-router) 9.0.2 (microrouter@3.0.0 ) 27,892
connect (router) 3.6.5 (router@1.3.2) 29,527
Fastify 0.35.6 31,319
micro 9.0.1 33,406
connect 3.6.5 35,803
-
http.Server 8.9.1 36,278

Benchmarks taken using http://www.oddjack.com/?certs=fastify/benchmarks. This is a synthetic, "hello world" benchmark that aims to evaluate the framework overhead. The overhead that each framework has on your application depends on your application, you should always benchmark if performance matters to you.

Documentation

Ecosystem

  • Core - Core plugins maintained by the Fastify team.
  • Community - Community supported plugins.

Team

Fastify is the result of the work of a great community. Team members are listed in alphabetical order.

Lead Maintainers

Collaborators

Acknowledgements

This project is kindly sponsored by:

License

Licensed under MIT.