public static function FPAFormBuilder::getRequiredMemory in Fast Permissions Administration 3.0.x

Same name and namespace in other branches

1. 8.2 src/FPAFormBuilder.php \Drupal\fpa\FPAFormBuilder::getRequiredMemory()

Gets required memory.

Return value

int Number of bytes of ram required to render the permissions form.

1 call to FPAFormBuilder::getRequiredMemory()

FPAFormBuilder::checkMemoryLimit in src/FPAFormBuilder.php

Checks memory limit.

File

src/FPAFormBuilder.php, line 28

Class

FPAFormBuilder

Class FPAFormBuilder.

Namespace

Drupal\fpa

Code

public static function getRequiredMemory($suffix = '') {
  $permission = \Drupal::service('user.permissions');
  $permissions_count = count($permission
    ->getPermissions());
  $user_roles_count = count(user_roles());
  $page_ram_required = 9 * 1024 * 1024;

  // Takes ~26kb per row without any checkboxes.
  $permission_row_overhead = 27261.028783658;
  $permissions_ram_required = $permissions_count * $permission_row_overhead;

  // Determined by checking peak ram on permissions page,
  // over several different number of visible roles.
  $bytes_per_checkbox = 18924.508820799;
  $checkboxes_ram_required = $permissions_count * $user_roles_count * $bytes_per_checkbox;
  $output = (int) ($page_ram_required + $permissions_ram_required + $checkboxes_ram_required);
  if (!empty($suffix)) {
    return $output . $suffix;
  }
  return $output;
}