<?php
//  var_dump(drupal_map_assoc($a));
//  var_dump(config('book.settings')->get());    


function book_type_is_allowed_new($type) {
  $allowed_types = config('book.settings')->get('allowed_types');
  return isset($allowed_types[$type]);
}

function book_type_is_allowed_old($type) {
  return in_array($type, config('book.settings')->get('allowed_types'));
}

function benchmark($function, $allowed_types, $iterations) {
  config('book.settings')->set('allowed_types', $allowed_types)->save();
  // Ensure book.settings read is primed.
  config('book.settings')->get();
  $start_time = microtime(1);

  for ($i = 0; $i < $iterations; $i ++) {
    $function('node');
    $function('e');
  }

  //at the end
  $cpu_time = microtime(1) - $start_time;
  $count = count($allowed_types);
  echo "Calling $function with $count allowed types takes $cpu_time seconds.\n";
}

$iterations = 100000;

$allowed_types = drupal_map_assoc(array(
  'book'
));
benchmark('book_type_is_allowed_old', $allowed_types, $iterations);
benchmark('book_type_is_allowed_new', $allowed_types, $iterations);

$allowed_types = drupal_map_assoc(array(
  'book', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i'
));
benchmark('book_type_is_allowed_old', $allowed_types, $iterations);
benchmark('book_type_is_allowed_new', $allowed_types, $iterations);