need good performance text to speech code

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Javascript

HTML

PhoneGap

hi my html code
my prob is slow performance.. when i click play it analysing the whole content from DB and then its reading.... i want this to be arrested.. kindly guide me..

var html = '';
   var html1='';
   var stop = false;
   function startupWin(result) {
       // When result is equal to STARTED we are ready to play
       if (result == TTS.STARTED) {
           window.plugins.tts.getLanguage(win, fail);
           // window.plugins.tts.speak("The text to speech service is ready");

       }
   }
   function win(result) {
       console.log(result);
   }
   function fail(result) {
       console.log("Error = " + result);
   }
   function speak() {
   var sp= html1.replace(/[^a-zA-Z 0-9.]+/g,'');
   console.log(sp);
   window.plugins.tts.speak(sp);
   }
   function shutdown() {
       window.plugins.tts.stop();
   }
   function silence() {
       window.plugins.tts.silence(86400000);
   }

   function home(){
 window.location="search.html";
 window.plugins.tts.stop();
 }

 function chapter(){
 var h=sessionStorage.getItem("previous");
  console.log("previous" +h);
  window.location =h;
 window.plugins.tts.stop();
 }


   function toggle(el) {
       if (el.className != "pause") {
           el.src ='pause.png';
           el.className = "pause";
           speak();

       } else if (el.className == "pause") {
           el.src = 'play.png';
           el.className = "play";
           shutdown();
       } return false;
   }