Sharkbench

Benchmarking programming languages and web frameworks

Fastify: Bun vs Node.js

Fastify is a high-performance Node.js web framework focused on providing low latency and high throughput by leveraging Node.js features and asynchronous I/O. It is known for its extensible plugin architecture and efficient handling of JSON-based data. Fastify offers a modern alternative to Express with better performance characteristics.

This benchmark tests how fast a framework can perform concurrent HTTP requests, I/O operations, and JSON de/serialization.

OS: LinuxCPU: Intel Core Ultra 5 325Last Updated: 2026-10-14

Comparison

Bun processes 1.33x requests per second compared to Node.js, a 33.45% improvement.

MedianP99

Mode	Requests per second How many requests per second can the framework handle? (higher is better)	Latency How long does it take to process a request? (lower is better)	Stability How stable is the framework under load? (median / P99 latency) (higher is better)	Memory How much memory (RAM) does the framework use? (lower is better)	Build Time Fetching dependencies + compiling, excluding SDK setup (lower is better)
Bun	19129 (+33.45 %)	1.0 ms (-41.06 %)	3.97 % (-5.97 %)	76.6 MB (-66.89 %)	3.83 s (-43.80 %)
Node.js	14334	1.8 ms	9.94 %	231.3 MB	6.81 s

All results

MedianP99

Framework	Requests per second How many requests per second can the framework handle? (higher is better)	Latency How long does it take to process a request? (lower is better)	Stability How stable is the framework under load? (median / P99 latency) (higher is better)	Memory How much memory (RAM) does the framework use? (lower is better)	Build Time Fetching dependencies + compiling, excluding SDK setup (lower is better)
JavaScript (Node.js v24) / Fastify v4	14334	1.8 ms	9.94 %	231.3 MB	6.81 s
JavaScript (Node.js v22) / Fastify v4	14257	2.1 ms	34.01 %	127.1 MB	5.72 s
JavaScript (Node.js v20) / Fastify v4	13720	2.2 ms	33.23 %	107.0 MB	5.49 s
JavaScript (Node.js v18) / Fastify v4	9003	3.4 ms	45.59 %	106.2 MB	5.20 s
JavaScript (Node.js v16) / Fastify v4	7932	3.6 ms	33.87 %	92.2 MB	4.96 s
JavaScript (Bun v1) / Fastify v4	19129	1.0 ms	3.97 %	76.6 MB	3.83 s

Popular web frameworks

How does Fastify compare to other popular frameworks?

MedianP99

Framework	Requests per second How many requests per second can the framework handle? (higher is better)	Latency How long does it take to process a request? (lower is better)	Stability How stable is the framework under load? (median / P99 latency) (higher is better)	Memory How much memory (RAM) does the framework use? (lower is better)	Build Time Fetching dependencies + compiling, excluding SDK setup (lower is better)
Rust / Axum	26670	1.2 ms	74.13 %	16.5 MB	26.69 s
JavaScript (Bun) / Fastify	19129	1.0 ms	3.97 %	76.6 MB	3.83 s
C# (.NET) / ASP.NET Core	17041	1.5 ms	23.04 %	101.8 MB	6.09 s
JavaScript (Node.js) / Express	15270	2.0 ms	29.45 %	228.4 MB	4.92 s
JavaScript (Node.js) / Fastify	14334	1.8 ms	9.94 %	231.3 MB	6.81 s
Java (Temurin) / Spring Boot (MVC)	2962	1.6 ms	1.86 %	286.4 MB	37.73 s
Go / Gin	1640	3.4 ms	3.65 %	23.1 MB	32.20 s
Python / FastAPI (Uvicorn)	792	32.9 ms	20.81 %	63.3 MB	8.55 s
Python / Flask (Gunicorn)	320	99.9 ms	56.36 %	110.2 MB	8.94 s
Python / Django (Gunicorn)	279	103.8 ms	57.16 %	151.9 MB	10.29 s
PHP / Laravel	92	319.0 ms	80.90 %	80.4 MB	95.22 s