add immediate options

@@ -32,6 +32,10 @@ class Sender extends EventEmitter {
             return;
         }
 
+        if  (this.options.immediate) {
+            return;
+        }
+
         // pre duration send array
         setInterval(() => {
             this._send();
@@ -61,7 +65,8 @@ class Sender extends EventEmitter {
         message.time = message.time || new Date().getTime() * 1000000;
         debug('add message! %O', message);
         this.batchMessages.push(message);
-        if (this.batchMessages.length > this.options.records) {
+
+        if ((this.batchMessages.length > this.options.records) || this.options.immediate) {
             this._send();
             debug('batchMessages over records and sent!');
         }