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: Thu Sep 18 2025 07:17:26 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	v20.19.5	✗	46496.0	21.01	8.29
fastify	5.6.0	✓	46196.0	21.14	8.28
connect	3.7.0	✗	46079.2	21.19	8.22
polka	0.5.2	✓	45009.6	21.72	8.03
0http	4.3.0	✓	44935.2	21.77	8.01
micro	10.0.1	✗	44428.8	22.00	7.92
connect-router	2.2.0	✓	43295.2	22.60	7.72
adonisjs	7.7.0	✓	42274.4	23.15	7.54
restana	v5.1.0	✓	40724.8	24.06	7.26
h3	1.15.4	✗	39999.2	24.51	7.13
srvx	0.8.7	✗	39509.6	24.81	7.69
h3-router	1.15.4	✓	38504.8	25.48	6.87
whatwg-node-server	0.10.12	✗	38275.2	25.61	6.83
hono	4.9.7	✓	36573.4	26.85	6.00
restify	11.1.0	✓	34486.6	28.49	6.22
koa	3.0.1	✗	34439.0	28.54	6.14
hapi	21.4.3	✓	30772.4	32.00	5.49
koa-router	14.0.0	✓	30734.4	32.03	5.48
microrouter	3.1.3	✓	29220.0	33.71	5.21
fastify-big-json	5.6.0	✓	11339.8	87.62	130.48
express	5.1.0	✓	10075.4	98.68	1.80
express-with-middlewares	5.1.0	✓	9020.5	110.25	3.35
trpc-router	11.5.1	✓	6023.7	165.23	1.33