Help in fixing the GCM Notification service delay When sending to our App users

Hello, Please share your plan and ability to fix the issue in your desc. NO general desc. We're using GCM services to send our Android users, it was working fine, until we have 2000 users, we noticed that pressing NOTIFY from the server side it takes 1:20 sec to send! Our service is real time service we need to send the notification in max 10 sec after we click notify regardless the number of users. The code responsible to send the notification is: Android-----> // for android if($alertlist->device_type== "Android") { $notificationdata = array( 'registration_ids' => array($alertlist->gcm_regid), 'data' => array("message" => strip_tags($alertlist->video_des), "video_id"=>$alertlist->id, "device_token"=>$alertlist->device_id, "device_type"=>$alertlist->device_type, "userid"=>$alertlist->user_id, "isnotification"=>$alertlist->isnotification, "issound"=>$alertlist->issound, "gonotification"=>'NO'), ); $api_key = "AIzaSyB##rTFi_PlEhiJYYiT31Iz9dVXuYys"; $headers = array( 'Authorization: key='.$api_key,'Content-Type: application/json' ); $url = '[login to view URL]'; $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_POST, true); curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4 ); curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode(($notificationdata))); $result = curl_exec($ch); // print_r($result); curl_close($ch); }