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

Clone this repo. Then

node ./benchmark [arguments (optional)]

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

Machine: linux x64 | 4 vCPUs | 15.6GB Mem
Node: v20.19.0
Run: Mon Mar 31 2025 15:14:27 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	5.2.2	✓	46172.8	21.16	8.28
connect	3.7.0	✗	45617.6	21.42	8.13
rayo	1.4.6	✓	45304.0	21.58	8.08
bare	v20.19.0	✗	45265.0	21.59	8.07
server-base	7.1.32	✗	44925.6	21.77	8.01
polka	0.5.2	✓	44879.2	21.79	8.00
server-base-router	7.1.32	✓	43934.4	22.26	7.83
micro	10.0.1	✗	43610.4	22.43	7.78
0http	4.2.0	✓	43382.4	22.56	7.74
h3-router	1.15.1	✓	42983.2	22.77	7.67
h3	1.15.1	✗	42963.2	22.77	7.66
connect-router	1.3.8	✓	42772.0	22.87	7.63
polkadot	1.0.0	✗	42484.0	23.03	7.58
adonisjs	7.6.0	✓	40604.0	24.12	7.24
hono	4.7.5	✓	39984.0	24.50	6.56
micro-route	2.5.0	✓	39812.0	24.61	7.10
restana	v5.0.0	✓	39392.8	24.88	7.03
koa	2.16.0	✗	36569.6	26.84	6.52
restify	11.1.0	✓	34999.8	28.07	6.31
koa-isomorphic-router	1.0.1	✓	34067.4	28.85	6.08
take-five	2.0.0	✓	33547.6	29.30	12.06
koa-router	13.1.0	✓	31866.8	30.88	5.68
hapi	21.4.0	✓	31130.0	31.62	5.55
microrouter	3.1.3	✓	29487.6	33.41	5.26
fastify-big-json	5.2.2	✓	11658.8	85.22	134.14
express	5.1.0	✓	10082.8	98.58	1.80
express-with-middlewares	5.1.0	✓	9132.1	108.89	3.40
trpc-router	10.45.2	✓	N/A	N/A	N/A