- Patch #221964 Crell / Larry Garfield et al: oh my, the registry patch lands.

CHANGELOG.txt

@@ -26,6 +26,10 @@ Drupal 7.0, xxxx-xx-xx (development version)
 - Removed throttle module:
     * Alternative methods for improving performance are available in other core and
       contributed modules.
+- Added code registry:
+    * Modules now declare their includable files via their .info file.  That
+      allows Drupal to scan files when a module is enabled and then lazy-load
+      code as needed, resulting in significant performance and memory improvements.
 
 Drupal 6.0, 2008-02-13
 ----------------------