PhoneGap + JQM Performance Tip #1: Prevent Default Event Behavior

eventHandler.js

var pageshow = function () {
    RocknCoder.Display.init($("#displayControl")[0]);
    $("button").tap(function(event){
      var key = $(this).attr("data-rockncoder-tag"),
        id = this.id;
      event.preventDefault();

      switch(id){
        case "key0":
        case "key1":
        case "key2":
        case "key3":
        case "key4":
        case "key5":
        case "key6":
        case "key7":
        case "key8":
        case "key9":
        case "keyDecimalPoint":
          RocknCoder.Display.enterDigit(key);
          break;
        case "keyC":
          RocknCoder.Display.clearDisplay();
          break;
        case "keyCe":
          RocknCoder.Display.clearError();
          break;
        case "keyAdd":
          RocknCoder.Display.setOperator("+");
          break;
        case "keySubtract":
          RocknCoder.Display.setOperator("-");
          break;
        case "keyMultiply":
          RocknCoder.Display.setOperator("*");
          break;
        case "keyDivide":
          RocknCoder.Display.setOperator("/");
          break;
        case "keyEquals":
          RocknCoder.Display.setOperator("=");
          break;
      }
      return false;
    });
  },