From 425daed8d0b026dd99417ccad1389f8d7ebee62d Mon Sep 17 00:00:00 2001
From: Michael Mulligan <mike@belineperspectives.com>
Date: Wed, 4 Nov 2015 15:14:36 -0500
Subject: [PATCH] Use isset() for performance. Same difference.

---
 src/Curl/CaseInsensitiveArray.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Curl/CaseInsensitiveArray.php b/src/Curl/CaseInsensitiveArray.php
index c42dc86..07714cb 100644
--- a/src/Curl/CaseInsensitiveArray.php
+++ b/src/Curl/CaseInsensitiveArray.php
@@ -136,7 +136,8 @@ class CaseInsensitiveArray implements \ArrayAccess, \Countable, \Iterator {
      */
     public function offsetGet($offset) {
         $offsetlower = strtolower($offset);
-        return array_key_exists($offsetlower, $this->data) ? $this->data[$offsetlower] : NULL;
+        // As isset() is false on 'NULL' anyway, use it, and return NULL, faster
+        return isset($this->data[$offsetlower]) ? $this->data[$offsetlower] : NULL;
     }
 
     /**