diff --git a/core/modules/user/src/Entity/User.php b/core/modules/user/src/Entity/User.php
index 1ac0682..62dce88 100644
--- a/core/modules/user/src/Entity/User.php
+++ b/core/modules/user/src/Entity/User.php
@@ -256,7 +256,17 @@ public function getCreatedTime() {
    * {@inheritdoc}
    */
   public function getLastAccessedTime() {
-    return $this->get('access')->value;
+    // Optimize for the case where the field object has not been initialized
+    // yet, directly access the value.
+    // @todo Use getFieldValue(), see https://www.drupal.org/node/2580551.
+    if (!isset($this->fields['access'])) {
+      if (isset($this->values['access'][LanguageInterface::LANGCODE_DEFAULT][0]['value'])) {
+        return $this->values['access'][LanguageInterface::LANGCODE_DEFAULT][0]['value'];
+      }
+    }
+    else {
+      return $this->get('access')->value;
+    }
   }
 
   /**
@@ -316,7 +326,17 @@ public function block() {
    * {@inheritdoc}
    */
   public function getTimeZone() {
-    return $this->get('timezone')->value;
+    // Optimize for the case where the field object has not been initialized
+    // yet, directly access the value.
+    // @todo Use getFieldValue(), see https://www.drupal.org/node/2580551.
+    if (!isset($this->fields['timezone'])) {
+      if (isset($this->values['timezone'][LanguageInterface::LANGCODE_DEFAULT][0]['value'])) {
+        return $this->values['timezone'][LanguageInterface::LANGCODE_DEFAULT][0]['value'];
+      }
+    }
+    else {
+      return $this->get('timezone')->value;
+    }
   }
 
   /**
@@ -378,7 +398,18 @@ public function getUsername() {
    * {@inheritdoc}
    */
   public function getAccountName() {
-    return $this->get('name')->value ?: '';
+    // Optimize for the case where the field object has not been initialized
+    // yet, directly access the value.
+    // @todo Use getFieldValue(), see https://www.drupal.org/node/2580551.
+    if (!isset($this->fields['name'])) {
+      if (isset($this->values['name'][LanguageInterface::LANGCODE_DEFAULT][0]['value'])) {
+        return $this->values['name'][LanguageInterface::LANGCODE_DEFAULT][0]['value'];
+      }
+    }
+    else {
+      return $this->get('name')->value;
+    }
+    return '';
   }
 
   /**