From 4bc9dfc6f8ca63ec8b5f1500904b332539df9e55 Mon Sep 17 00:00:00 2001
From: Vladimir Razuvaev <vladimir.razuvaev@gmail.com>
Date: Wed, 10 Oct 2018 11:29:14 +0200
Subject: [PATCH] Reverted unneeded change in the defaultFieldResolver

---
 src/Executor/Executor.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Executor/Executor.php b/src/Executor/Executor.php
index 4567fa7..7d5c0b9 100644
--- a/src/Executor/Executor.php
+++ b/src/Executor/Executor.php
@@ -6,6 +6,7 @@ namespace GraphQL\Executor;
 
 use ArrayAccess;
 use ArrayObject;
+use Closure;
 use Exception;
 use GraphQL\Error\Error;
 use GraphQL\Error\InvariantViolation;
@@ -1523,6 +1524,7 @@ class Executor
             }
         }
 
-        return is_callable($property) ? $property($source, $args, $context, $info) : $property;
+        // Using instanceof vs is_callable() because it is 2-10 times faster
+        return $property instanceof Closure ? $property($source, $args, $context, $info) : $property;
     }
 }