note 118460 added to regexp.reference.onlyonce

I decided to compare a performance of two patterns: (\D+|<\d+>)*[!?] and ((?>\D+)|<\d+>)*[!?] They said that the first pattern will be slower than second one when the subject string does not contain matches. But this is not truth. <?php $subject = ''; for($i = 0; $i < 100000; $i++) $subject .= 'aBa'; $pattern = '/((?>\D+)|<\d+>)*[!?]/'; $time_start = microtime(true); preg_match($pattern, $subject); $time_end = microtime(true); $time = $time_end - $time_start; echo "Time: $time"; ?> The output will be: Time: 37.874154090881 Meanwhile if we change pattern to '/(\D+|<\d+>)*[!?]/' the output will be: Time: 0.013736963272095 ---- Server IP: 195.54.192.44 Probable Submitter: 78.155.168.129 ---- Manual Page -- http://php.net/manual/en/regexp.reference.onlyonce.php Edit -- https://master.php.net/note/edit/118460 Del: integrated -- https://master.php.net/note/delete/118460/integrated Del: useless -- https://master.php.net/note/delete/118460/useless Del: bad code -- https://master.php.net/note/delete/118460/bad+code Del: spam -- https://master.php.net/note/delete/118460/spam Del: non-english -- https://master.php.net/note/delete/118460/non-english Del: in docs -- https://master.php.net/note/delete/118460/in+docs Del: other reasons-- https://master.php.net/note/delete/118460 Reject -- https://master.php.net/note/reject/118460 Search -- https://master.php.net/manage/user-notes.php