diff --git a/src/Symfony/Component/HttpKernel/Profiler/Profiler.php b/src/Symfony/Component/HttpKernel/Profiler/Profiler.php
index f226a83ae6..b451bc62ca 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/Profiler.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/Profiler.php
@@ -89,6 +89,19 @@ class Profiler
         return $profiler;
     }
 
+    /**
+     * Purges all data from the storage.
+     */
+    public function purge()
+    {
+        $this->storage->purge();
+    }
+
+    /**
+     * Exports the current profiler data.
+     *
+     * @return string The exported data
+     */
     public function export()
     {
         $unpack = unpack('H*', serialize(array($this->token, $this->collectors, $this->ip, $this->url, $this->time)));
@@ -96,6 +109,13 @@ class Profiler
         return $unpack[1];
     }
 
+    /**
+     * Imports data into the profiler storage.
+     *
+     * @param string $data A data string as exported by the export() method
+     *
+     * @return string The token associated with the imported data
+     */
     public function import($data)
     {
         list($token, $collectors, $ip, $url, $time) = unserialize(pack('H*', $data));
diff --git a/src/Symfony/Component/HttpKernel/Profiler/ProfilerStorageInterface.php b/src/Symfony/Component/HttpKernel/Profiler/ProfilerStorageInterface.php
index 7df35704fd..c8d12eeaae 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/ProfilerStorageInterface.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/ProfilerStorageInterface.php
@@ -50,4 +50,9 @@ interface ProfilerStorageInterface
      * @param integer $time  The time of the data
      */
     function write($token, $data, $ip, $url, $time);
+
+    /**
+     * Purges all data from the database.
+     */
+    function purge();
 }
diff --git a/src/Symfony/Component/HttpKernel/Profiler/SQLiteProfilerStorage.php b/src/Symfony/Component/HttpKernel/Profiler/SQLiteProfilerStorage.php
index 9ad7971c22..185f571e7f 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/SQLiteProfilerStorage.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/SQLiteProfilerStorage.php
@@ -89,21 +89,24 @@ class SQLiteProfilerStorage implements ProfilerStorageInterface
             ':time'  => $time,
         );
         $this->exec($db, 'INSERT INTO data (token, data, ip, url, time) VALUES (:token, :data, :ip, :url, :time)', $args);
-        $this->purge();
+        $this->cleanup();
         $this->close($db);
     }
 
-    public function purge($all = false)
+    /**
+     * {@inheritdoc}
+     */
+    public function purge()
     {
         $db = $this->initDb();
+        $this->exec($db, 'DELETE FROM data');
+        $this->close($db);
+    }
 
-        if (true === $all) {
-            $this->exec($db, 'DELETE FROM data');
-        } else {
-            $args = array(':time' => time() - $this->lifetime);
-            $this->exec($db, 'DELETE FROM data WHERE time < :time', $args);
-        }
-
+    protected function cleanup()
+    {
+        $db = $this->initDb();
+        $this->exec($db, 'DELETE FROM data WHERE time < :time', array(':time' => time() - $this->lifetime));
         $this->close($db);
     }