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 Oct 01 2025 01:43:51 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	✗	45884.8	21.30	8.18
connect	3.7.0	✗	45449.6	21.51	8.11
fastify	5.6.1	✓	45132.0	21.66	8.09
polka	0.5.2	✓	44672.8	21.89	7.97
0http	4.3.0	✓	44455.2	22.00	7.93
micro	10.0.1	✗	43156.0	22.67	7.70
connect-router	2.2.0	✓	41880.8	23.38	7.47
adonisjs	7.7.0	✓	41606.4	23.53	7.42
h3	1.15.4	✗	41537.6	23.58	7.41
restana	v5.1.0	✓	41404.0	23.66	7.38
h3-router	1.15.4	✓	39749.6	24.66	7.09
whatwg-node-server	0.10.12	✗	38686.4	25.36	6.90
hono	4.9.9	✓	36309.0	27.04	5.96
koa	3.0.1	✗	33795.8	29.09	6.03
restify	11.1.0	✓	33425.2	29.42	6.02
koa-router	14.0.0	✓	30156.4	32.66	5.38
hapi	21.4.3	✓	30035.2	32.78	5.36
microrouter	3.1.3	✓	28637.2	34.42	5.11
srvx	0.8.9	✗	19436.4	50.92	3.78
fastify-big-json	5.6.1	✓	11273.8	88.13	129.72
express	5.1.0	✓	9533.5	104.26	1.70
express-with-middlewares	5.1.0	✓	8646.6	114.98	3.22
trpc-router	11.6.0	✓	6195.7	160.65	1.36