javascript - Very slow loop in angularjs -


i use loop create map markers (1000 points):

var markers = {}; (var = 0; < items.data.data.length; i++) {     latval = items.data.data[i].lat;     lngval = items.data.data[i].lng;     ikona = icons.infost;     message = "<b>" + items.data.data[i].name + "</b>";     markers[i] = {'group': 'cmp', 'lat' : eval(latval), 'lng' : eval(lngval), 'icon' : ikona, 'message' : message}; } $scope.markers = markers;

how can improve loop speed in angularjs (currently takes 10s)?

there few things can improve code speed avoiding eval , caching loop variables , arrays well. caching values, reduce bunch of operations member access , unecessary calculations.

var items = { data: { data: [] }};  var icons = { infost: 'infost'};  (var = 0; < 1000; i++) {    items.data.data.push({ lat: ''+i, lng: ''+i, name:''+i });  }    console.time('time');    /// code starts here    var    data = items.data.data,    l = data.length,    markers = array(l), // or []    item, latval, lngval, ikona, message;    (var = 0; < l; i++) {    item = data[i];      latval = item.lat;    lngval = item.lng;    ikona = icons.infost;    message = "<b>" + item.name + "</b>";    markers[i] = {      group: 'cmp',      lat: +latval,      lng: +lngval,      icon: ikona,      message: message    };  }  console.timeend('time');  //$scope.markers = markers;


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