Add a simple pprof middleware for newcomers

Former-commit-id: f533df7e84b7e174d4cb861ff50d81772550feb0

middleware/pprof/_example/main.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"gopkg.in/kataras/iris.v6"
+	"gopkg.in/kataras/iris.v6/adaptors/httprouter"
+	"gopkg.in/kataras/iris.v6/middleware/pprof"
+)
+
+func main() {
+	app := iris.New()
+	app.Adapt(iris.DevLogger())
+	app.Adapt(httprouter.New())
+
+	app.Get("/", func(ctx *iris.Context) {
+		ctx.HTML(iris.StatusOK, "<h1> Please click <a href='/debug/pprof'>here</a>")
+	})
+
+	app.Get("/debug/pprof/*action", pprof.New())
+	//                              ___________
+	// Note:
+	// if you prefer gorillamux adaptor, then
+	// the wildcard for gorilla mux (as you already know) is '{action:.*}' instead of '*action'.
+	app.Listen(":8080")
+}