Sharkbench

Benchmarking programming languages and web frameworks

Koa: Bun vs Deno vs Node.js

Koa is a lightweight and expressive web framework for Node.js created by the team behind Express. It leverages JavaScript's async functions to eliminate callbacks and improve error handling. Koa provides an elegant middleware architecture that processes requests downstream and manipulates responses upstream. Unlike Express, Koa doesn't bundle any middleware in its core or provide built-in routing, emphasizing modularity and giving developers greater flexibility in their component choices.

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 3.41x requests per second compared to Deno, a 240.98% 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	19071 (+49.71 %)	1.0 ms (-60.12 %)	3.22 % (-30.89 %)	75.7 MB (-25.60 %)	3.09 s (-34.79 %)
Node.js	12739	2.4 ms	34.10 %	101.8 MB	4.73 s
Deno	5593 (-56.10 %)	4.6 ms (+91.30 %)	16.16 % (-17.94 %)	153.1 MB (+50.39 %)	3.72 s (-21.46 %)

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) / Koa v2	16795	1.8 ms	31.25 %	232.8 MB	5.76 s
JavaScript (Node.js v22) / Koa v2	13338	2.3 ms	33.09 %	123.7 MB	5.68 s
JavaScript (Node.js v20) / Koa v3	12739	2.4 ms	34.10 %	101.8 MB	4.73 s
JavaScript (Node.js v20) / Koa v2	12941	2.4 ms	35.03 %	105.8 MB	4.96 s
JavaScript (Deno v2.1) / Koa v3	5593	4.6 ms	16.16 %	153.1 MB	3.72 s
JavaScript (Deno v2.1) / Koa v2	5698	4.5 ms	16.70 %	147.8 MB	4.14 s
JavaScript (Bun v1) / Koa v3	19071	1.0 ms	3.22 %	75.7 MB	3.09 s
JavaScript (Bun v1) / Koa v2	19331	0.9 ms	3.12 %	74.7 MB	3.56 s

Popular web frameworks

How does Koa 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) / Koa	19071	1.0 ms	3.22 %	75.7 MB	3.09 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) / Koa	12739	2.4 ms	34.10 %	101.8 MB	4.73 s
JavaScript (Deno) / Koa	5593	4.6 ms	16.16 %	153.1 MB	3.72 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