From 0e2959cc32de3a2e2cb80364c4a00c53bc5be5c9 Mon Sep 17 00:00:00 2001
From: Alexey Kupershtokh <alexey.kupershtokh@gmail.com>
Date: Wed, 20 Nov 2013 10:14:44 +0700
Subject: [PATCH] Cache in VersionConstraint

---
 .../LinkConstraint/VersionConstraint.php        | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/Composer/Package/LinkConstraint/VersionConstraint.php b/src/Composer/Package/LinkConstraint/VersionConstraint.php
index 0e8a8c3b7..9bf5e515b 100644
--- a/src/Composer/Package/LinkConstraint/VersionConstraint.php
+++ b/src/Composer/Package/LinkConstraint/VersionConstraint.php
@@ -60,12 +60,27 @@ class VersionConstraint extends SpecificConstraint
         return version_compare($a, $b, $operator);
     }
 
+    public function matchSpecific(VersionConstraint $provider, $compareBranches = false)
+    {
+        static $c = array();
+        if (isset($c[$this->operator][$this->version][$provider->operator][$provider->version][$compareBranches])) {
+            //if ($c[$this->operator][$this->version][$provider->operator][$provider->version][$compareBranches] !=
+            //    $this->_matchSpecific($provider, $compareBranches)) {
+            //    throw new \Exception('Broken cache');
+            //}
+            return $c[$this->operator][$this->version][$provider->operator][$provider->version][$compareBranches];
+        }
+
+        return $c[$this->operator][$this->version][$provider->operator][$provider->version][$compareBranches] =
+            $this->_matchSpecific($provider, $compareBranches);
+    }
+
     /**
      * @param  VersionConstraint $provider
      * @param  bool              $compareBranches
      * @return bool
      */
-    public function matchSpecific(VersionConstraint $provider, $compareBranches = false)
+    public function _matchSpecific(VersionConstraint $provider, $compareBranches = false)
     {
         $noEqualOp = str_replace('=', '', $this->operator);
         $providerNoEqualOp = str_replace('=', '', $provider->operator);