Use microtime to have more precision on cache time

UPGRADE.md

@@ -1,5 +1,11 @@
 # Upgrade to 2.5
 
+## Minor BC BREAK: query cache key time is now a float
+
+As of 2.5, the `QueryCacheEntry#time` property will contain a float value
+instead of an integer in order to have more precision and also to be consistent
+with the `TimestampCacheEntry#time`.
+
 ## Minor BC BREAK: discriminator map must now include all non-transient classes
 
 It is now required that you declare the root of an inheritance in the

lib/Doctrine/ORM/Cache/QueryCacheEntry.php

@@ -38,18 +38,18 @@ class QueryCacheEntry implements CacheEntry
     /**
      * READ-ONLY: Public only for performance reasons, it should be considered immutable.
      *
-     * @var integer Time creation of this cache entry
+     * @var float Time creation of this cache entry
      */
     public $time;
 
     /**
-     * @param array   $result
+     * @param array $result
-     * @param integer $time
+     * @param float $time
      */
     public function __construct($result, $time = null)
     {
         $this->result = $result;
-        $this->time   = $time ?: time();
+        $this->time   = $time ?: microtime(true);
     }
 
     /**

lib/Doctrine/ORM/Cache/TimestampQueryCacheValidator.php

@@ -35,6 +35,6 @@ class TimestampQueryCacheValidator implements QueryCacheValidator
             return true;
         }
 
-        return ($entry->time + $key->lifetime) > time();
+        return ($entry->time + $key->lifetime) > microtime(true);
     }
 }

tests/Doctrine/Tests/ORM/Cache/DefaultQueryCacheTest.php

@@ -436,7 +436,7 @@ class DefaultQueryCacheTest extends OrmTestCase
             array('id'=>2, 'name' => 'Bar')
         );
 
-        $entry->time = time() - 100;
+        $entry->time = microtime(true) - 100;
 
         $this->region->addReturn('get', $entry);
         $this->region->addReturn('get', new EntityCacheEntry(Country::CLASSNAME, $entities[0]));