diff --git a/lib/datalib.php b/lib/datalib.php
index 7d4512c0e01..526b16e4ffa 100644
--- a/lib/datalib.php
+++ b/lib/datalib.php
@@ -1762,6 +1762,11 @@ function user_accesstime_log($courseid=0) {
         return;
     }
 
+    if (isguestuser()) {
+        // Do not update guest access times/ips for performance.
+        return;
+    }
+
     if (empty($courseid)) {
         $courseid = SITEID;
     }
diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index 752465ce324..05721fd2434 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -3201,6 +3201,11 @@ function get_user_key($script, $userid, $instance=null, $iprestriction=null, $va
 function update_user_login_times() {
     global $USER, $DB;
 
+    if (isguestuser()) {
+        // Do not update guest access times/ips for performance.
+        return true;
+    }
+
     $now = time();
 
     $user = new stdClass();