Perf: Potential source of jank.

[BleuShan]

While looking at the source, I've stumbled upon those lines three lines:

gridstack-angular/src/gridstack.directive.js

Lines 26 to 27 in a2bccee

	$timeout(function() {
	scope.$apply();

gridstack-angular/src/gridstack.directive.js

Lines 37 to 38 in a2bccee

	$timeout(function() {
	scope.$apply();

gridstack-angular/src/gridstack.directive.js

Lines 48 to 49 in a2bccee

	$timeout(function() {
	scope.$apply();

Given that $timeout, when it resolves, calls $rootScope#$apply, it is somewhat redundant to call $scope.$apply within a $timeout callback. In some context its a potential source of jank because you might be forcing angular to re-digest the whole DOM.

You might consider removing those three lines or replacing $timeout with setTimeout.
I did some testing and had some UI responsiveness issues when resizing some grid items which was alleviated with the removal.