Speed up getDescendants and setCollapsed.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1708 c400ca83-b69d-9dd7-9705-49c6b8615e23

core/block.js

@@ -1083,7 +1083,7 @@ Blockly.Block.prototype.setParent = function(newParent) {
 Blockly.Block.prototype.getDescendants = function() {
   var blocks = [this];
   for (var child, x = 0; child = this.childBlocks_[x]; x++) {
-    blocks = blocks.concat(child.getDescendants());
+    blocks.push.apply(child.getDescendants());
   }
   return blocks;
 };
@@ -1423,7 +1423,7 @@ Blockly.Block.prototype.setCollapsed = function(collapsed) {
   var renderList = [];
   // Show/hide the inputs.
   for (var x = 0, input; input = this.inputList[x]; x++) {
-    renderList = renderList.concat(input.setVisible(!collapsed));
+    renderList.push.apply(input.setVisible(!collapsed));
   }
 
   var COLLAPSED_INPUT_NAME = '_TEMP_COLLAPSED_INPUT';

core/connection.js

@@ -675,7 +675,7 @@ Blockly.Connection.prototype.unhideAll = function() {
       connections = block.getConnections_(true);
     }
     for (var c = 0; c < connections.length; c++) {
-      renderList = renderList.concat(connections[c].unhideAll());
+      renderList.push.apply(connections[c].unhideAll());
     }
     if (renderList.length == 0) {
       // Leaf block.