use expvar

Signed-off-by: Mohamed Hamza <[email protected]>

Author: mhamza15

go/stats/export.go

@@ -100,17 +100,16 @@ func (vg *varGroup) publish(name string, v expvar.Var) {
 	vg.Lock()
 	defer vg.Unlock()
 
-	// Check if the variable is already exported
-	if _, ok := vg.vars[name]; ok {
+	// Check if the variable is already registered
+	if v := expvar.Get(name); v != nil {
 		return
 	}
-
 	expvar.Publish(name, v)
 	if vg.newVarHook != nil {
 		vg.newVarHook(name, v)
+	} else {
+		vg.vars[name] = v
 	}
-
-	vg.vars[name] = v
 }
 
 var defaultVarGroup = varGroup{vars: make(map[string]expvar.Var)}