lib: predeclare Event.isTrusted prop descriptor

It improves Event creation performance. PR-URL: #46527 Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Yagiz Nizipli <[email protected]> Reviewed-By: Ruben Bridgewater <[email protected]> Reviewed-By: Antoine du Hamel <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Rafael Gonzaga <[email protected]>
nodejs · Apr 3, 2023 · 71249a6 · 71249a6
1 parent 2b80d19
commit 71249a6
Showing 1 changed file with 8 additions and 6 deletions.
diff --git a/lib/internal/event_target.js b/lib/internal/event_target.js
@@ -78,6 +78,13 @@ const isTrusted = ObjectGetOwnPropertyDescriptor({
   }
 }, 'isTrusted').get;
 
+const isTrustedDescriptor = {
+  __proto__: null,
+  configurable: false,
+  enumerable: true,
+  get: isTrusted,
+};
+
 function isEvent(value) {
   return typeof value?.[kType] === 'string';
 }
@@ -113,12 +120,7 @@ class Event {
     }
 
     // isTrusted is special (LegacyUnforgeable)
-    ObjectDefineProperty(this, 'isTrusted', {
-      __proto__: null,
-      get: isTrusted,
-      enumerable: true,
-      configurable: false
-    });
+    ObjectDefineProperty(this, 'isTrusted', isTrustedDescriptor);
     this[kTarget] = null;
     this[kIsBeingDispatched] = false;
   }