perf: avoid mutating internal state if setting state to current re: #11380

Author: vkarpov15

lib/statemachine.js

@@ -65,7 +65,11 @@ StateMachine.ctor = function() {
  */
 
 StateMachine.prototype._changeState = function _changeState(path, nextState) {
-  const prevBucket = this.states[this.paths[path]];
+  const prevState = this.paths[path];
+  if (prevState === nextState) {
+    return;
+  }
+  const prevBucket = this.states[prevState];
   if (prevBucket) delete prevBucket[path];
 
   this.paths[path] = nextState;

lib/types/array/methods/index.js

@@ -375,7 +375,7 @@ const methods = {
         atomics.$push = val;
       } else {
         if (val.length === 1) {
-          atomics.$push.$each.push(val);
+          atomics.$push.$each.push(val[0]);
         } else if (val.length < 10000) {
           atomics.$push.$each.push(...val);
         } else {