diff -u b/core/lib/Drupal/Core/Config/StorageComparer.php b/core/lib/Drupal/Core/Config/StorageComparer.php
--- b/core/lib/Drupal/Core/Config/StorageComparer.php
+++ b/core/lib/Drupal/Core/Config/StorageComparer.php
@@ -35,14 +35,14 @@
   protected $changelist;
 
   /**
-   * Lists all the configuration object names in the source storage.
+   * Sorted list of all the configuration object names in the source storage.
    *
    * @var array
    */
   protected $sourceNames = array();
 
   /**
-   * Lists all the configuration object names in the target storage.
+   * Sorted list of all the configuration object names in the target storage.
    *
    * @var array
    */
@@ -129,7 +129,7 @@
    * {@inheritdoc}
    */
   public function createChangelist() {
-    $this->setUpData();
+    $this->getAndSortConfigData();
     $this->addChangelistCreate();
     $this->addChangelistUpdate();
     $this->addChangelistDelete();
@@ -140,36 +140,36 @@
 
   /**
    * Creates the delete changelist.
+   *
+   * The list of deletes is sorted so that dependencies are deleted after
+   * configuration entities that depend on them. For example, field instances
+   * should be deleted before fields.
    */
   protected function addChangelistDelete() {
-    // Sort deletes in such a way that dependencies are deleted after
-    // configuration entities that depend on them. For example, field instances
-    // should be deleted before fields and fields should be deleted before
-    // content types.
     $deletes = array_diff(array_reverse($this->targetNames), $this->sourceNames);
     $this->addChangeList('delete', $deletes);
   }
 
   /**
    * Creates the create changelist.
+   *
+   * The list of creates is sorted so that dependencies are created before
+   * configuration entities that depend on them. For example, field instances
+   * should be created after fields.
    */
   protected function addChangelistCreate() {
-    // Organise creates in such a way that dependencies are created before
-    // configuration entities that depend on them. For example, field instances
-    // should be created after fields and fields should be created after
-    // content types.
     $creates = array_diff($this->sourceNames, $this->targetNames);
     $this->addChangeList('create', $creates);
   }
 
   /**
    * Creates the update changelist.
+   *
+   * The list of updates is sorted so that dependencies are created before
+   * configuration entities that depend on them. For example, field instances
+   * should be created after fields.
    */
   protected function addChangelistUpdate() {
-    // Organise updates in such a way that dependencies are updated before
-    // configuration entities that depend on them. For example, field instances
-    // should be updated after fields and fields should be updated after
-    // content types.
     foreach (array_intersect($this->sourceNames, $this->targetNames) as $name) {
       if ($this->sourceData[$name] !== $this->targetData[$name]) {
         $this->addChangeList('update', array($name));
@@ -208,9 +208,9 @@
   }
 
   /**
-   * Sets up the data required to determine and sort the change lists.
+   * Gets and sorts configuration data from the source and target storages.
    */
-  protected function setUpData() {
+  protected function getAndSortConfigData() {
     $this->targetData = $this->targetStorage->readMultiple($this->targetStorage->listAll());
     $this->sourceData = $this->sourceStorage->readMultiple($this->sourceStorage->listAll());
     $dependency_manager = new ConfigDependencyManager();