Prevent unnecessary function calls

handlePointerMove_ doesn't need to be called when dragging.
handleDragEvent_ takes care of the event in that case.

in handleDragEvent_, createOrUpdateVertexFeature_ doesn't need to be called for each dragged segment. it can be called only once with current vertex.

fixes made to pass the build

examples/modify-test.js

@@ -129,7 +129,7 @@ var source = new ol.source.GeoJSON(
                 [[[-5e6, 6e6], [-5e6, 8e6], [-3e6, 8e6],
                     [-3e6, 6e6], [-5e6, 6e6]]],
                 [[[-3e6, 6e6], [-2e6, 8e6], [0, 8e6],
-                    [0, 6e6], [-3e6, 6e6] ]],
+                    [0, 6e6], [-3e6, 6e6]]],
                 [[[1e6, 6e6], [1e6, 8e6], [3e6, 8e6],
                     [3e6, 6e6], [1e6, 6e6]]]
               ]

src/ol/interaction/modifyinteraction.js

@@ -507,8 +507,8 @@ ol.interaction.Modify.handleDragEvent_ = function(evt) {
     }
 
     geometry.setCoordinates(coordinates);
-    this.createOrUpdateVertexFeature_(vertex);
   }
+  this.createOrUpdateVertexFeature_(vertex);
 };
 
 
@@ -538,7 +538,8 @@ ol.interaction.Modify.handleUpEvent_ = function(evt) {
 ol.interaction.Modify.handleEvent = function(mapBrowserEvent) {
   var handled;
   if (!mapBrowserEvent.map.getView().getHints()[ol.ViewHint.INTERACTING] &&
-      mapBrowserEvent.type == ol.MapBrowserEvent.EventType.POINTERMOVE) {
+      mapBrowserEvent.type == ol.MapBrowserEvent.EventType.POINTERMOVE &&
+      !this.handlingDownUpSequence) {
     this.handlePointerMove_(mapBrowserEvent);
   }
   if (!goog.isNull(this.vertexFeature_) &&