Function BenchmarkSingleRouteMetrics

modules/caddyhttp/metrics_test.go:602–631

BenchmarkSingleRouteMetrics simulates the new behavior where metrics are collected once for the entire route.

(b *testing.B)

// BenchmarkSingleRouteMetrics simulates the new behavior where metrics
// are collected once for the entire route.
func BenchmarkSingleRouteMetrics(b *testing.B) {
	ctx, _ := caddy.NewContext(caddy.Context{Context: context.Background()})
	m := &Metrics{
		init:        sync.Once{},
		httpMetrics: &httpMetrics{},
	}

	// Build a chain of 5 plain middleware handlers (no per-handler metrics)
	var next Handler = HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
		return nil
	})
	for i := 0; i < 5; i++ {
		capturedNext := next
		next = HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
			return capturedNext.ServeHTTP(w, r)
		})
	}

	// Wrap the entire chain with a single route-level metrics handler
	ih := newMetricsInstrumentedRoute(ctx, "handler", next, m)

	r := httptest.NewRequest("GET", "/", nil)
	w := httptest.NewRecorder()

	b.ResetTimer()
	b.ReportAllocs()
	for i := 0; i < b.N; i++ {
		ih.ServeHTTP(w, r)
	}
}