Baidu Map loading large amounts of trace lead in jsp page map Caton

Original painting line mode:

// store a large array of point trajectory json: historyPathList 
for ( var I = 0; I <-historyPathList.length. 1; I ++ ) {    
       drawColorLine (I, Color, . 4 , historyPathList); 
   } 
// display the original route 
function drawColorLine (I, Color, weitht, List) {
     var Polyline = new new BMap.Polyline ([
         new new BMap.Point (List [I] .lng, List [I] .lat), // starting point latitude and longitude 
        new new BMap.Point (List [I + 1'd] .lng, List [I +. 1] .lat) // end latitude and longitude 
    ], {strokeColor is: color, // set the color 
        strokeWeight: weitht, // width
        strokeOpacity:. 1}); // transparency of 
    the Map.addOverlay (Polyline); 
}

Write a lot of unnecessary points will pay more, but the API call too many times, can affect performance.

Improve:

 var polylinePointsArray = [];
   for(var i=0;i<historyPathList.length;i++){
       polylinePointsArray[i] = new BMap.Point(historyPathList[i].Lng,historyPathList[i].Lat);
   }
   var polyline = new BMap.Polyline(polylinePointsArray, {strokeColor:"green", strokeWeight:4, strokeOpacity:1})
   map.addOverlay(polyline);