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'; /** - * By default, fast 404s are returned as part of the normal page request - * process, which will properly serve valid pages that happen to match and will - * also log actual 404s to the Drupal log. Alternatively you can choose to - * return a 404 now by uncommenting the following line. This will reduce server - * load, but will cause even valid pages that happen to match the pattern to - * return 404s, rather than the actual page. It will also prevent the Drupal - * system log entry. Ensure you understand the effects of this before enabling. + * By default the page request process will return a fast 404 page for missing + * files if they match the regular expression set in '404_fast_paths' and not + * '404_fast_paths_exclude' above. 404 errors will simultaneously be logged in + * the Drupal system log. * - * To enable this functionality, remove the leading hash sign below. + * You can choose to return a fast 404 page earlier for missing pages (as soon + * as settings.php is loaded) by uncommenting the line below. This speeds up + * server response time when loading 404 error pages and prevents the 404 error + * from being logged in the Drupal system log. In order to prevent valid pages + * such as image styles and other generated content that may match the + * '404_fast_html' regular expression from returning 404 errors, it is necessary + * to add them to the '404_fast_paths_exclude' regular expression above. Make + * sure that you understand the effects of this feature before uncommenting the + * line below. */ # drupal_fast_404();