From 27217675765f05f3d30203953030e1b7d72a6af1 Mon Sep 17 00:00:00 2001
From: Ruben Bridgewater <ruben@bridgewater.de>
Date: Thu, 28 Dec 2017 23:44:24 +0100
Subject: [PATCH] util: improve setting default options

Object.assign is currently very slow. Using Object.keys is much
faster in v8 6.3.
---
 lib/util.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/util.js b/lib/util.js
index ad5285360a8d8f..64719d597d7dd7 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -317,7 +317,9 @@ Object.defineProperty(inspect, 'defaultOptions', {
     if (options === null || typeof options !== 'object') {
       throw new errors.TypeError('ERR_INVALID_ARG_TYPE', 'options', 'Object');
     }
-    Object.assign(inspectDefaultOptions, options);
+    const keys = Object.keys(options);
+    for (var i = 0; i < keys.length; i++)
+      inspectDefaultOptions[keys[i]] = options[keys[i]];
     return inspectDefaultOptions;
   }
 });