How to count group contents and members in a performance way

Is there a performance way to count group users and members without using an static query?

Currently I'm using this and works:

$connection = \Drupal::database();

$query = $connection->query('SELECT count(id) as count FROM {group_content_field_data} WHERE gid = :id AND type LIKE :type', [
  ':id' => $group->id(),
  ':type' => $group->getGroupType()->id() . '-group_node-%',
]);
$count_contents = $query->fetchAll();

$query = $connection->query('SELECT count(id) as count FROM {group_content_field_data} WHERE gid = :id AND type LIKE :type', [
  ':id' => $group->id(),
  ':type' => $group->getGroupType()->id() . '-group_membership-%',
]);
$count_users = $query->fetchAll();

Static quering not seems a secure long-term approach, but If I use other ways like count getContents I totally lost performance:

$count_contents = count($group->getContent());
$count_users = count($group->getMembers());

It's there other performance way using entity query?