From fec0f1c8bbebd61f2b4cfc497d8034486340db50 Mon Sep 17 00:00:00 2001
From: Aaron O'Mullan <aaron.omullan@gmail.com>
Date: Thu, 30 Sep 2021 21:33:12 +0200
Subject: [PATCH] perf(webidl): optimize createDictionaryConverter() (#12279)

On a benchmark constructing Responses with headers this shaves off 25%
---
 ext/webidl/00_webidl.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ext/webidl/00_webidl.js b/ext/webidl/00_webidl.js
index d5bad4f158..08de5aba66 100644
--- a/ext/webidl/00_webidl.js
+++ b/ext/webidl/00_webidl.js
@@ -41,6 +41,7 @@
     NumberMAX_SAFE_INTEGER,
     // deno-lint-ignore camelcase
     NumberMIN_SAFE_INTEGER,
+    ObjectAssign,
     ObjectCreate,
     ObjectDefineProperties,
     ObjectDefineProperty,
@@ -726,7 +727,7 @@
       }
       const esDict = V;
 
-      const idlDict = { ...defaultValues };
+      const idlDict = ObjectAssign({}, defaultValues);
 
       // NOTE: fast path Null and Undefined.
       if ((V === undefined || V === null) && !hasRequiredKey) {