Get Marker text of type

Hi community,

I try to get external links of doc using markers. I filter markers with type 'Hypertext' and search in them 'www', 'http'. 

Problem is that when working with big file, that contains more than 30000 markers FrameMaker crashes.

Here is the code that I use:

function getLinksFromDoc(oDoc) {
  
  var marker = oDoc.FirstMarkerInDoc
  var dLinks = {};
  var lTemp;
   while (marker.id) {
    if (marker.MarkerTypeId.Name = 'Hypertext' && (marker.MarkerText.match('URL') || marker.MarkerText.match('http') || marker.MarkerText.match('www') )  ) {
      markerText = marker.MarkerText;
      lTemp = markerText.split(' ');
      for (var i = 0; i < lTemp.length; i++) {
        if (lTemp[i].match('http') || lTemp[i].match('www')) {
          dLinks[lTemp[i]] = 1;
        }
      }
    } 
    marker = marker.NextMarkerInDoc;
  }

  return dLinks;
}

Does anybody know how to get only markers with specific type? 

What can I do to optimize the code?