Performance improvements to response and moved tests around

tests/performance/golang/golang.http.go

@@ -0,0 +1,16 @@
+package main
+
+import (
+    "fmt"
+    "os"
+    "net/http"
+)
+
+func handler(w http.ResponseWriter, r *http.Request) {
+    fmt.Fprintf(w, "Hi there, I love %s!", r.URL.Path[1:])
+}
+
+func main() {
+    http.HandleFunc("/", handler)
+    http.ListenAndServe(":" + os.Args[1], nil)
+}