TL;DR

• Fastify is a fast and low overhead web framework for Node.js.
• This package shows how fast it is compared to other JS frameworks: these benchmarks do not pretend to represent a real-world scenario, but they give a good indication of the framework overhead.
• The benchmarks are run automatically on GitHub actions, which means they run on virtual hardware that can suffer from the "noisy neighbor" effect; this means that the results can vary.
• For metrics (cold-start) see metrics.md

Requirements

To be included in this list, the framework should captivate users' interest. We have identified the following minimal requirements:

• Ensure active usage: a minimum of 500 downloads per week
• Maintain an active repository with at least one event (comment, issue, PR) in the last month
• The framework must use the Node.js HTTP module

Usage

Clone this repo. Then

node ./benchmark [arguments (optional)]

Arguments

• -h: Help on how to use the tool.
• bench: Benchmark one or more modules.
• compare: Get comparative data for your benchmarks.

Create benchmark before comparing; benchmark bench

You may also compare all test results, at once, in a single table; benchmark compare -t

You can also extend the comparison table with percentage values based on fastest result; benchmark compare -p

Benchmarks

• Machine: linux x64 | 4 vCPUs | 15.6GB Mem
• Node: v20.19.5
• Run: Wed Sep 24 2025 13:09:15 GMT+0000 (Coordinated Universal Time)
• Method: autocannon -c 100 -d 40 -p 10 localhost:3000 (two rounds; one to warm-up, one to measure)

	Version	Router	Requests/s	Latency (ms)	Throughput/Mb
fastify	5.6.1	✓	47002.4	20.77	8.43
node-http	v20.19.5	✗	46680.0	20.92	8.32
connect	3.7.0	✗	46140.8	21.17	8.23
polka	0.5.2	✓	45517.6	21.47	8.12
micro	10.0.1	✗	44703.2	21.87	7.97
connect-router	2.2.0	✓	43009.6	22.75	7.67
0http	4.3.0	✓	42972.0	22.77	7.66
h3	1.15.4	✗	42588.0	22.99	7.59
adonisjs	7.7.0	✓	41422.4	23.65	7.39
h3-router	1.15.4	✓	41286.4	23.73	7.36
restana	v5.1.0	✓	40408.0	24.25	7.21
srvx	0.8.7	✗	39829.6	24.60	7.75
whatwg-node-server	0.10.12	✗	39306.4	24.94	7.01
hono	4.9.8	✓	37351.2	26.27	6.13
koa	3.0.1	✗	35396.6	27.76	6.31
restify	11.1.0	✓	35069.0	28.01	6.32
hapi	21.4.3	✓	32470.4	30.28	5.79
koa-router	14.0.0	✓	31740.4	31.00	5.66
microrouter	3.1.3	✓	29026.4	33.94	5.18
fastify-big-json	5.6.1	✓	11866.2	83.71	136.53
express	5.1.0	✓	10009.4	99.30	1.78
express-with-middlewares	5.1.0	✓	9088.1	109.42	3.38
trpc-router	11.5.1	✓	6259.6	158.98	1.38