JS Runtimes

Deno 2.0 vs Bun 1.2 vs Node.js 25: The HTTP/3 and WebSocket Server Performance Showdown

Master runtime network performance. Read an in-depth benchmark analysis of HTTP/3 and WebSocket event loops in Deno, Bun, and Node.js.

Sachin SharmaCreator

Jun 5, 2026

6 min read

Deno 2.0 vs Bun 1.2 vs Node.js 25: The HTTP/3 and WebSocket Server Performance Showdown

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Master runtime network performance. Read an in-depth benchmark analysis of HTTP/3 and WebSocket event loops in Deno, Bun, and Node.js.

Deno Bun Node.js HTTP/3 WebSockets Performance JS Engines Backend Development

Sachin Sharma

Software Developer

Building digital experiences at the intersection of design and code. Sharing weekly insights on engineering, productivity, and the future of tech.

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Deno 2.0 vs Bun 1.2 vs Node.js 25: The HTTP/3 and WebSocket Server Performance Showdown

Compare HTTP/3 and WebSocket server performance across Node.js, Deno, and Bun under heavy concurrent connections and memory budgets.