From 20ed1ad177684b6c648a5dd545f53a7fdb79fc70 Mon Sep 17 00:00:00 2001
From: Ben Newman <ben@benjamn.com>
Date: Thu, 25 Feb 2016 23:18:14 -0500
Subject: [PATCH] Fast path for plain objects.

---
 index.js | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index 6c7dd2a..7407a70 100644
--- a/index.js
+++ b/index.js
@@ -78,7 +78,10 @@ function toTable(value) {
     if (value && typeof value === "object") {
       var keys = Object.keys(value);
 
-      if (Array.isArray(value)) {
+      if (isPlainObject(value)) {
+        result = {};
+
+      } else if (Array.isArray(value)) {
         result = Array(value.length);
         var len = value.length;
         if (len > keys.length) {
@@ -136,6 +139,17 @@ function toTable(value) {
   return table;
 }
 
+function isPlainObject(value) {
+  var isObject = value && typeof value === "object";
+  if (isObject) {
+    var proto = Object.getPrototypeOf
+      ? Object.getPrototypeOf(value)
+      : value.__proto__;
+    return proto === Object.prototype;
+  }
+  return false;
+}
+
 exports.decode = exports.parse =
 function decode(encoding) {
   return fromTable(JSON.parse(encoding));