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: v20.19.6
• Run: Tue Dec 02 2025 08:38:04 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
node-http	v20.19.6	✗	47898.4	20.38	8.54
fastify	5.6.2	✓	47330.4	20.63	8.49
connect	3.7.0	✗	46331.2	21.08	8.26
polka	0.5.2	✓	46058.4	21.21	8.21
micro	10.0.1	✗	44692.8	21.87	7.97
0http	4.3.0	✓	43913.6	22.28	7.83
h3	1.15.4	✗	43012.8	22.75	7.67
connect-router	2.2.0	✓	42675.2	22.92	7.61
adonisjs	7.7.0	✓	41866.4	23.38	7.47
h3-router	1.15.4	✓	41676.8	23.50	7.43
restana	v5.1.0	✓	41036.8	23.87	7.32
whatwg-node-server	0.10.17	✗	38301.6	25.60	6.83
hono	4.10.7	✓	37111.2	26.44	6.09
koa	3.1.1	✗	34753.8	28.28	6.20
restify	11.1.0	✓	34571.6	28.42	6.23
koa-router	14.0.0	✓	32353.6	30.40	5.77
hapi	21.4.4	✓	31538.8	31.20	5.62
microrouter	3.1.3	✓	29692.8	33.17	5.30
srvx	0.9.7	✗	19520.1	50.71	3.80
fastify-big-json	5.6.2	✓	11645.6	85.29	134.00
express	5.2.1	✓	10139.2	98.04	1.81
express-with-middlewares	5.2.1	✓	9061.4	109.72	3.37
trpc-router	11.7.2	✓	6344.6	156.86	1.40