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: Sat Nov 01 2025 01:42:52 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	✓	46524.0	20.99	8.34
polka	0.5.2	✓	45502.4	21.48	8.12
node-http	v20.19.5	✗	44930.4	21.76	8.01
connect	3.7.0	✗	44828.6	21.82	7.99
0http	4.3.0	✓	44159.2	22.15	7.87
micro	10.0.1	✗	43188.8	22.65	7.70
connect-router	2.2.0	✓	42832.0	22.84	7.64
adonisjs	7.7.0	✓	41727.2	23.47	7.44
h3	1.15.4	✗	41045.6	23.86	7.32
restana	v5.1.0	✓	40057.6	24.46	7.14
h3-router	1.15.4	✓	40028.8	24.47	7.14
whatwg-node-server	0.10.13	✗	38228.8	25.67	6.82
hono	4.10.4	✓	37043.2	26.50	6.08
restify	11.1.0	✓	34314.2	28.64	6.18
koa	3.1.1	✗	33809.6	29.07	6.03
hapi	21.4.3	✓	31596.6	31.14	5.63
koa-router	14.0.0	✓	31380.8	31.36	5.60
microrouter	3.1.3	✓	28974.8	34.01	5.17
srvx	0.8.16	✗	19368.4	51.12	3.77
fastify-big-json	5.6.1	✓	11504.4	86.35	132.37
express	5.1.0	✓	9821.4	101.21	1.75
express-with-middlewares	5.1.0	✓	9113.5	109.12	3.39
trpc-router	11.7.1	✓	6123.5	162.54	1.35