G1Joshi 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.
Best Practices (2025)
Do:
- Use
v3: For stable generic support. - Be careful with Prefork: Can cause issues with socket connections if not handled.
- Use Built-in Middleware: Cache, Compress, CORS are highly optimized.
Don't:
- Don't hold references:
fasthttpreuses context objects. Copy strings if you need them after handler returns.