events: improve performance of EventEmitter.emit

This restore some performance we lost when we introduced primordialias.
Improvements are up to +100%.

PR-URL: #29633
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: David Carlier <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Yongsheng Zhang <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>

Author: mcollina

lib/events.js

@@ -22,6 +22,7 @@
 'use strict';
 
 const { Math, Object, Reflect } = primordials;
+const apply = Reflect.apply;
 
 var spliceOne;
 
@@ -206,12 +207,12 @@ EventEmitter.prototype.emit = function emit(type, ...args) {
     return false;
 
   if (typeof handler === 'function') {
-    Reflect.apply(handler, this, args);
+    apply(handler, this, args);
   } else {
     const len = handler.length;
     const listeners = arrayClone(handler, len);
     for (var i = 0; i < len; ++i)
-      Reflect.apply(listeners[i], this, args);
+      apply(listeners[i], this, args);
   }
 
   return true;