<?php
function hello_menu() {
  $items = array();

  $items['hello'] = array(
    'title' => 'Hello world page...',
    'page callback' => 'hello_page',
    'access arguments' => array('access content'),
    'type' => MENU_CALLBACK,
  );
  return $items;
}

function hello_page() {
  return '<p>Hello world</p>';
}
?>

Response time:              0.10 secs
Transaction rate:          51.37 trans/sec