Let's instrument the response time before writting the template

lib/stats.go

@@ -26,10 +26,13 @@ type handler struct {
 	template *Template
 	hostname string
 	ro       bool
+	t1       time.Time
 }
 
 func (h handler) load(tmpl string, data interface{}) {
 	var err error
+
+	h.t1 = time.Now()
 	fmt := h.r.FormValue("fmt")
 	switch fmt {
 	case "rss":
@@ -91,8 +94,10 @@ func (sg StatsGatherer) Gather(function func(handler)) func(http.ResponseWriter,
 
 		t0 := time.Now()
 		function(h)
-		t1 := time.Now()
-		sg.channel <- statsRequest{r, t1.Sub(t0)}
+		if h.t1.IsZero() {
+			h.t1 = time.Now()
+		}
+		sg.channel <- statsRequest{r, h.t1.Sub(t0)}
 	}
 }