Use .push.apply (#5024)

Author: JoviDeCroock

src/diff/index.js

@@ -13,7 +13,8 @@ import {
 	SVG_NAMESPACE,
 	UNDEFINED,
 	XHTML_NAMESPACE,
-	MATHML_TOKEN_ELEMENTS
+	MATHML_TOKEN_ELEMENTS,
+	EMPTY_ARR
 } from '../constants';
 import { BaseComponent, getDomSibling } from '../component';
 import { Fragment } from '../create-element';
@@ -209,7 +210,7 @@ export function diff(
 						if (vnode) vnode._parent = newVNode;
 					});
 
-					c._renderCallbacks.push(...c._stateCallbacks);
+					EMPTY_ARR.push.apply(c._renderCallbacks, c._stateCallbacks);
 					c._stateCallbacks = [];
 
 					if (c._renderCallbacks.length) {
@@ -245,7 +246,7 @@ export function diff(
 
 				tmp = c.render(c.props, c.state, c.context);
 
-				c._renderCallbacks.push(...c._stateCallbacks);
+				EMPTY_ARR.push.apply(c._renderCallbacks, c._stateCallbacks);
 				c._stateCallbacks = [];
 			} else {
 				do {