From 680b31c5e017568331818817898a43e99dfe4b31 Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Tue, 9 Apr 2013 19:54:15 +0200
Subject: [PATCH] Eliminate an ol.TileCoord allocation

---
 src/ol/tilegrid/tilegrid.js | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/ol/tilegrid/tilegrid.js b/src/ol/tilegrid/tilegrid.js
index 2035b1f7a4..577f6dec6a 100644
--- a/src/ol/tilegrid/tilegrid.js
+++ b/src/ol/tilegrid/tilegrid.js
@@ -92,6 +92,13 @@ ol.tilegrid.TileGrid = function(options) {
 };
 
 
+/**
+ * @private
+ * @type {ol.TileCoord}
+ */
+ol.tilegrid.TileGrid.tmpTileCoord_ = new ol.TileCoord(0, 0, 0);
+
+
 /**
  * @param {ol.TileCoord} tileCoord Tile coordinate.
  * @param {function(this: T, number, ol.TileRange): boolean} callback Callback.
@@ -213,11 +220,12 @@ ol.tilegrid.TileGrid.prototype.getTileRangeExtent =
  */
 ol.tilegrid.TileGrid.prototype.getTileRangeForExtentAndResolution =
     function(extent, resolution, opt_tileRange) {
-  var tileCoord = this.getTileCoordForXYAndResolution_(
-      extent.minX, extent.minY, resolution, false);
+  var tileCoord = ol.tilegrid.TileGrid.tmpTileCoord_;
+  this.getTileCoordForXYAndResolution_(
+      extent.minX, extent.minY, resolution, false, tileCoord);
   var minX = tileCoord.x;
   var minY = tileCoord.y;
-  tileCoord = this.getTileCoordForXYAndResolution_(
+  this.getTileCoordForXYAndResolution_(
       extent.maxX, extent.maxY, resolution, true, tileCoord);
   return ol.TileRange.createOrUpdate(
       minX, minY, tileCoord.x, tileCoord.y, opt_tileRange);