From 976fe48a72c2ef6cfeda0e8991a232f210e49a9a Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Mon, 6 May 2013 10:16:30 +0200
Subject: [PATCH] Optimize grabbing of first char

---
 src/Composer/Autoload/ClassLoader.php | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Composer/Autoload/ClassLoader.php b/src/Composer/Autoload/ClassLoader.php
index 739e5cc96..3679d4646 100644
--- a/src/Composer/Autoload/ClassLoader.php
+++ b/src/Composer/Autoload/ClassLoader.php
@@ -98,7 +98,8 @@ class ClassLoader
 
             return;
         }
-        $first = substr($prefix, 0, 1);
+
+        $first = $prefix[0];
         if (!isset($this->prefixes[$first][$prefix])) {
             $this->prefixes[$first][$prefix] = (array) $paths;
 
@@ -216,7 +217,7 @@ class ClassLoader
 
         $classPath .= strtr($className, '_', DIRECTORY_SEPARATOR) . '.php';
 
-        $first = substr($class, 0, 1);
+        $first = $class[0];
         if (isset($this->prefixes[$first])) {
             foreach ($this->prefixes[$first] as $prefix => $dirs) {
                 if (0 === strpos($class, $prefix)) {