if (bUsePassedData) {
  for (var i = 0, len = oInit.aaData.length; i < len; i++) {
      _fnAddData(oSettings, oInit.aaData[i]);
  }
} else if (oSettings.bDeferLoading ||
               (oSettings.sAjaxSource === null && oSettings.ajax === null)) {
  _fnAddTr(oSettings, $(oSettings.nTBody).children('tr'));
}

(oSettings.sAjaxSource === null && oSettings.ajax === null) // true

function beforeIf(){
     if (bUsePassedData) {
       procesData(oSettings,oInit.aaData.concat());
     } else if (oSettings.bDeferLoading ||
                   (oSettings.sAjaxSource === null && oSettings.ajax === null)) {
       _fnAddTr(oSettings, $(oSettings.nTBody).children('tr'));
     }
     afterIF();
    }
function processData(oSettings,arr){
  //process in chuncks of 50;
  // setTimeout takes a long time in IE
  // it'll noticibly slow donw your script when
  // only processing one item at the time
  var tmp=arr.splice(0,50);
  for (var i = 0, len = tmp.length; i < len; i++) {
      _fnAddData(oSettings, tmp[i]);
  }
  if(arr.length!==0){
    setTimeout(function(){
      processData(oSettings,arr);
    },0);
    return;
  }
  afterIf();
}
function afterIf(){
  //continue processing
}

(function processData(oSettings, arr) {

  var tmp = arr.splice(0, 50);

  tickApp.$orders.dataTable().fnAddData(tmp);

  if (arr.length !== 0) {
    setTimeout(function () {
      processData(oSettings, arr);
    }, 0);
  }
}(oSettings, oInit.aaData.concat()));

tickApp.$orders = $('#orders');

var DEFAULT_CHUNK_SIZE = 200;

function feedDataToDataTableInChunks(data, oSettings) {
    var chunk = data.splice(0, DEFAULT_CHUNK_SIZE);
    oSettings.oInstance.fnAddData(chunk, false);
    if(data.length !== 0) {
        setTimeout(function () {
            feedDataToDataTableInChunks(data, oSettings);
        });
    } else {
        oSettings.oInstance.fnDraw();
    }
}

var config = {fnServerData: function(){
    oSettings.jqXHR = $.getJSON(sSource, aoData)
        .done(function (result) {
            feedDataToDataTableInChunks(result || [], oSettings);
        });
}}