Fiber

Fiber is an Express.js inspired framework for Go, running on fasthttp (the fastest HTTP engine for Go). v3 brings generic support and better middleware.

When to Use

• Benchmarks: You need the absolute highest raw throughput.
• Node.js Background: The API (app.Get("/", ...) feels like Express).
• Zero Allocation: Obsessive memory optimization.

Core Concepts

Fasthttp

Doesn't use net/http. Much faster but incompatible with some standard library middlewares.

Prefork

Spawn multiple processes (SO_REUSEPORT) to utilize all cores.