Update the stream_playlist table to use MyISAM

InnoDB's performance is unacceptable out of the box, and there's no
clean way to batch these insertions into transactions, and stuff.

Benchmarks for 1000 inserts:
InnoDB: 54.826
MyISAM: 0.091
InnoDB transaction: 0.159

Fixes GH #14

2 files changed, 15 insertions, 1 deletions

diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 4af14511..40236cd8 100755
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -3,6 +3,7 @@ CHANGELOG
 
 3.6-FUTURE
 ----------
+- Improved the performance of stream playlist creation (reported by AkbarSerad)
 - Fixed "Pure Random" / Random URLs (reported by mafe)
 
 
diff --git a/lib/class/update.class.php b/lib/class/update.class.php
index 2bfcdd4d..dcaeceaf 100644
--- a/lib/class/update.class.php
+++ b/lib/class/update.class.php
@@ -337,6 +337,10 @@ class Update {
 
         $update_string = '- Drop enum for the type field in session.<br />';
         $version[] = array('version' => '360012', 'description' => $update_string);
+
+        $update_string = '- Update stream_playlist table to address performance issues.<br />';
+        $version[] = array('version' => '360013', 'description' => $update_string);
+
         return $version;
 
     }
@@ -1505,12 +1509,21 @@ class Update {
     }
 
     /**
-     * update_360012()
+     * update_360012
      *
      * Drop the enum on session.type
      */
     public static function update_360012() {
         return Dba::write('ALTER TABLE `session` CHANGE `type` `type` VARCHAR(16) DEFAULT NULL');
     }
+
+    /**
+     * update_360013
+     *
+     * MyISAM works better out of the box for the stream_playlist table
+     */
+    public static function update_360013() {
+        return Dba::write('ALTER TABLE `stream_playlist` ENGINE=MyISAM');
+    }
 }
 ?>