There is no single winner; net/http is the standard, Fiber is fastest, Gin is a balanced middle ground, and Echo is lightweight. Use net/http for standard library consistency, Fiber for maximum throughput, or Gin/Echo for middleware ecosystems. Benchmark your specific workload using go test -bench.
// Benchmark your handlers
func BenchmarkFiber(b *testing.B) { /* Fiber setup */ }
func BenchmarkGin(b *testing.B) { /* Gin setup */ }
func BenchmarkEcho(b *testing.B) { /* Echo setup */ }
func BenchmarkStdlib(b *testing.B) { /* net/http setup */ }