Return 404 if Next does not match

router.go

@@ -87,6 +87,8 @@ func (app *App) next(ctx *Ctx) bool {
 		// Stop scanning the stack
 		return true
 	}
+	ctx.SendStatus(404)
+	ctx.SendString("Cannot " + ctx.method + " " + ctx.pathOriginal)
 	return false
 }
 

router_test.go

@@ -179,10 +179,10 @@ func registerDummyRoutes(app *App) {
 // go test -v ./... -run=^$ -bench=Benchmark_Router_NotFound -benchmem -count=4
 func Benchmark_Router_NotFound(b *testing.B) {
 	app := New()
-	registerDummyRoutes(app)
 	app.Use(func(c *Ctx) {
-
+		c.Next()
 	})
+	registerDummyRoutes(app)
 	c := &fasthttp.RequestCtx{}
 
 	c.Request.Header.SetMethod("DELETE")