Issue #3517891: Show elapsed & estimated time in batch

src/QueueUIBatch.php

@@ -63,7 +63,8 @@ class QueueUIBatch implements QueueUIBatchInterface {
   public function batch(array $queues): void {
     $batch = (new BatchBuilder())
       ->setTitle($this->t('Processing queues'))
-      ->setFinishCallback([$this, 'finish']);
+      ->setFinishCallback([$this, 'finish'])
+      ->setProgressMessage('Elapsed time: @elapsed. Estimated time to complete: @estimate.');
     foreach ($queues as $queue_name) {
       $batch->addOperation([$this, 'step'], [$queue_name]);
     }