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: Linux/DockerCPU: Ryzen 7 7800X3DLast Updated: 2025-05-04

Comparison

Bun processes 2.21x requests per second compared to Node.js, a 121.45% improvement.

Mode	Requests per second Indicates how many requests per second the framework can handle. (higher is better)	Latency Indicates how long it takes to process a request. (lower is better)	Stability Indicates how stable the framework is under load: median / P99 latency (higher is better)	Memory Indicates how much memory (RAM) the framework uses. (lower is better)
Bun	20683 (+121.45 %)	1.3 ms (-62.83 %)	9.20 % (-53.99 %)	49.8 MB (-12.67 %)
Node.js	9340	3.4 ms	63.19 %	57.0 MB

All results

MedianP99

Framework	Requests per second Indicates how many requests per second the framework can handle. (higher is better)	Latency Indicates how long it takes to process a request. (lower is better)	Stability Indicates how stable the framework is under load: median / P99 latency (higher is better)	Memory Indicates how much memory (RAM) the framework uses. (lower is better)
JavaScript (Node.js v22) / Fastify v4	9340	3.4 ms	63.19 %	57.0 MB
JavaScript (Node.js v20) / Fastify v4	9199	3.5 ms	64.73 %	54.9 MB
JavaScript (Node.js v18) / Fastify v4	5179	5.7 ms	39.80 %	59.5 MB
JavaScript (Node.js v16) / Fastify v4	4622	6.3 ms	31.28 %	54.0 MB
JavaScript (Node.js v14) / Fastify v4	4847	6.0 ms	39.83 %	57.8 MB
JavaScript (Bun v1) / Fastify v4	20683	1.3 ms	9.20 %	49.8 MB

Popular web frameworks

How does Fastify compare to other popular frameworks?

MedianP99

Framework	Requests per second Indicates how many requests per second the framework can handle. (higher is better)	Latency Indicates how long it takes to process a request. (lower is better)	Stability Indicates how stable the framework is under load: median / P99 latency (higher is better)	Memory Indicates how much memory (RAM) the framework uses. (lower is better)
Rust / Axum	21030	1.6 ms	71.96 %	8.5 MB
JavaScript (Bun) / Fastify	20683	1.3 ms	9.20 %	49.8 MB
C# (.NET) / ASP.NET Core	14707	1.2 ms	2.64 %	136.5 MB
JavaScript (Node.js) / Fastify	9340	3.4 ms	63.19 %	57.0 MB
JavaScript (Node.js) / Express	5766	5.5 ms	64.50 %	82.5 MB
Go / Gin	3546	1.0 ms	1.14 %	16.7 MB
Python / FastAPI (Uvicorn)	1185	21.0 ms	21.21 %	41.2 MB
Java (Temurin) / Spring Boot (MVC)	1105	1.7 ms	1.67 %	596.8 MB
Python / Flask (Gunicorn)	1092	7.7 ms	9.22 %	90.3 MB
Python / Django (Gunicorn)	950	8.8 ms	10.33 %	130.1 MB
PHP / Laravel	299	101.7 ms	56.47 %	84.2 MB