if ($is_dryrun) {
  echo tsprintf(
    "%s\n",
    pht(
      'DRYRUN: Would apply patch "%s" to host "%s".',
      $key,
      $ref_key));
} else {
  echo tsprintf(
    "%s\n",
    pht(
      'Applying patch "%s" to host "%s"...',
      $key,
      $ref_key));
}

$t_begin = microtime(true);
$api->applyPatch($patch);
$t_end = microtime(true);