- Patch #661420 by justinrandell, David_Rothstein: made installation of modules much more efficient.

includes/bootstrap.inc

@@ -2098,8 +2098,22 @@ function _registry_check_code($type, $name = NULL) {
  * each interface or class in the database.
  */
 function registry_rebuild() {
+  system_rebuild_module_data();
+  registry_update();
+}
+
+/**
+ * Update the registry based on the latest files listed in the database.
+ *
+ * This function should be used when system_rebuild_module_data() does not need
+ * to be called, because it is already known that the list of files in the
+ * {system} table matches those in the file system.
+ *
+ * @see registry_rebuild()
+ */
+function registry_update() {
   require_once DRUPAL_ROOT . '/includes/registry.inc';
-  _registry_rebuild();
+  _registry_update();
 }
 
 /**

includes/module.inc

@@ -319,8 +319,8 @@ function module_enable($module_list, $disable_modules_installed_hook = FALSE) {
     system_list_reset();
     module_list(TRUE);
     module_implements('', FALSE, TRUE);
-    // Force to regenerate the stored list of hook implementations.
-    registry_rebuild();
+    // Update the registry to include the new enabled module.
+    registry_update();
     // Refresh the schema to include the new enabled module.
     drupal_get_schema(NULL, TRUE);
 
@@ -383,8 +383,8 @@ function module_disable($module_list) {
     // Invoke hook_modules_disabled before disabling modules,
     // so we can still call module hooks to get information.
     module_invoke_all('modules_disabled', $invoke_modules);
-    // Force to regenerate the stored list of hook implementations.
-    registry_rebuild();
+    // Update the registry to remove the newly-disabled module.
+    registry_update();
   }
 
   // If there remains no more node_access module, rebuilding will be

includes/registry.inc

@@ -17,9 +17,9 @@
  */
 
 /**
- * @see registry_rebuild.
+ * @see registry_update().
  */
-function _registry_rebuild() {
+function _registry_update() {
 
   // The registry serves as a central autoloader for all classes, including
   // the database query builders. However, the registry rebuild process
@@ -35,11 +35,12 @@ function _registry_rebuild() {
   require_once DRUPAL_ROOT . '/includes/database/' . $driver . '/query.inc';
 
   // Get current list of modules and their files.
-  $modules = system_rebuild_module_data();
+  $modules = db_query("SELECT * FROM {system} WHERE type = 'module'")->fetchAll();
   // Get the list of files we are going to parse.
   $files = array();
   foreach ($modules as &$module) {
-    $dir = dirname($module->uri);
+    $module->info = unserialize($module->info);
+    $dir = dirname($module->filename);
 
     // Store the module directory for use in hook_registry_files_alter().
     $module->dir = $dir;

modules/system/system.api.php

@@ -2192,7 +2192,7 @@ function hook_disable() {
  *   files found in each enabled module's info file and the core includes
  *   directory. The array is keyed by the file path and contains an array of
  *   the related module's name and weight as used internally by
- *   _registry_rebuild() and related functions.
+ *   _registry_update() and related functions.
  *
  *   For example:
  *   @code
@@ -2202,17 +2202,17 @@ function hook_disable() {
  *     );
  *   @endcode
  * @param $modules
- *   List of all the modules provided as returned by drupal_system_listing().
- *   The list also contains the .info file information in the property 'info'.
- *   An additional 'dir' property has been added to the module information
- *   which provides the path to the directory in which the module resides. The
- *   example shows how to take advantage of the property both properties.
+ *   An array containing all module information stored in the {system} table.
+ *   Each element of the array also contains the module's .info file
+ *   information in the property 'info'. An additional 'dir' property has been
+ *   added to the module information which provides the path to the directory
+ *   in which the module resides. The example shows how to take advantage of
+ *   both properties.
  *
- * @see _registry_rebuild()
- * @see drupal_system_listing()
+ * @see _registry_update()
  * @see simpletest_test_get_all()
  */
-function hook_registry_files_alter(&$files, $module_cache) {
+function hook_registry_files_alter(&$files, $modules) {
   foreach ($modules as $module) {
     // Only add test files for disabled modules, as enabled modules should
     // already include any test files they provide.