1 files changed, 15 insertions, 8 deletions
diff --git a/deps/v8/src/builtins/array-of.tq b/deps/v8/src/builtins/array-of.tq
index 44c2cdca27..b469ec5f5c 100644
--- a/deps/v8/src/builtins/array-of.tq
+++ b/deps/v8/src/builtins/array-of.tq
@@ -19,14 +19,21 @@ ArrayOf(
   let a: JSReceiver;
 
   // 4. If IsConstructor(C) is true, then
-  typeswitch (c) {
-    case (c: Constructor): {
-      // a. Let A be ? Construct(C, « len »).
-      a = Construct(c, len);
-    }
-    case (JSAny): {
-      // a. Let A be ? ArrayCreate(len).
-      a = ArrayCreate(len);
+  try {
+    // Allocate an array with PACKED elements kind for fast-path rather than
+    // calling the constructor which creates an array with HOLEY kind.
+    if (c != GetArrayFunction()) goto CreateWithConstructor;
+    a = NewJSArrayFilledWithZero(SmiUntag(len)) otherwise CreateWithConstructor;
+  } label CreateWithConstructor {
+    typeswitch (c) {
+      case (c: Constructor): {
+        // a. Let A be ? Construct(C, « len »).
+        a = Construct(c, len);
+      }
+      case (JSAny): {
+        // a. Let A be ? ArrayCreate(len).
+        a = ArrayCreate(len);
+      }
     }
   }