Only reprioritize tile queue when more tiles will be loaded

src/ol/map.js

@@ -586,8 +586,10 @@ ol.Map.prototype.handlePostRender = function() {
     }
   }
 
-  this.tileQueue_.reprioritize(); // FIXME only call if needed
+  if (this.tileQueue_.getTilesLoading() < maxTotalLoading) {
+    this.tileQueue_.reprioritize(); // FIXME only call if view has changed
     this.tileQueue_.loadMoreTiles(maxTotalLoading, maxNewLoads);
+  }
 
   var postRenderFunctions = this.postRenderFunctions_;
   var i;

src/ol/tilequeue.js

@@ -58,6 +58,14 @@ ol.TileQueue = function(tilePriorityFunction, tileChangeCallback) {
 goog.inherits(ol.TileQueue, ol.structs.PriorityQueue);
 
 
+/**
+ * @return {number} Number of tiles loading.
+ */
+ol.TileQueue.prototype.getTilesLoading = function() {
+  return this.tilesLoading_;
+};
+
+
 /**
  * @protected
  */