use requestAnimationFrame

lib/ace/lib/event.js

@@ -298,11 +298,18 @@ if (window.postMessage && !useragent.isOldIE) {
         win.postMessage(messageName, "*");
     };
 }
-else {
-    exports.nextTick = function(callback, win) {
-        win = win || window;
-        window.setTimeout(callback, 0);
-    };
-}
 
+
+exports.nextFrame = window.requestAnimationFrame ||
+    window.oRequestAnimationFrame ||
+    window.msRequestAnimationFrame ||
+    window.mozRequestAnimationFrame ||
+    window.webkitRequestAnimationFrame;
+
+if (exports.nextFrame)
+    exports.nextFrame = exports.nextFrame.bind(window);
+else
+    exports.nextFrame = function(callback) {
+        setTimeout(callback, 17);
+    };
 });

lib/ace/renderloop.js

@@ -68,7 +68,7 @@ var RenderLoop = function(onRender, win) {
         if (!this.pending) {
             this.pending = true;
             var _self = this;
-            event.nextTick(function() {
+            event.nextFrame(function() {
                 _self.pending = false;
                 var changes;
                 while (changes = _self.changes) {