diff --git a/Civi/API/Subscriber/DebugSubscriber.php b/Civi/API/Subscriber/DebugSubscriber.php
index ac1abad89494..0e6be75478e7 100644
--- a/Civi/API/Subscriber/DebugSubscriber.php
+++ b/Civi/API/Subscriber/DebugSubscriber.php
@@ -24,6 +24,29 @@ class DebugSubscriber implements EventSubscriberInterface {
    */
   private $debugLog;
 
+  /**
+   * @var bool
+   */
+  private $enableStats;
+
+  public function __construct() {
+    $version = phpversion('xdebug');
+    switch ($version ? substr($version, 0, 2) : NULL) {
+      case '2.':
+        $this->enableStats = function_exists('xdebug_time_index');
+        break;
+
+      case '3.':
+        $xdebugMode = explode(',', ini_get('xdebug.mode'));
+        $this->enableStats = in_array('develop', $xdebugMode);
+        break;
+
+      default:
+        $this->enableStats = FALSE;
+        break;
+    }
+  }
+
   /**
    * @return array
    */
@@ -70,7 +93,7 @@ public function onApiRespond(\Civi\API\Event\RespondEvent $event) {
       if (isset($this->debugLog) && $this->debugLog->getMessages()) {
         $debug['log'] = $this->debugLog->getMessages();
       }
-      if (function_exists('xdebug_time_index')) {
+      if ($this->enableStats) {
         $debug['peakMemory'] = xdebug_peak_memory_usage();
         $debug['memory'] = xdebug_memory_usage();
         $debug['timeIndex'] = xdebug_time_index();