#41216 [Opn->Bgs]: PCRE_UTF8 slows down 30 times

ID: 41216 Updated by: tony2001@php.net Reported By: DPP <paul dot dovbush at gmail dot com> -Status: Open +Status: Bogus Bug Type: PCRE related Operating System: WinXPsp2 PHP Version: 5.2.1 New Comment: Sorry, but your problem does not imply a bug in PHP itself. For a list of more appropriate places to ask for help using PHP, please visit http://www.php.net/support.php as this bug system is not the appropriate forum for asking support questions. Due to the volume of reports we can not explain in detail here why your report is not a bug. The support channels will be able to provide an explanation for you. Thank you for your interest in PHP. Previous Comments: ------------------------------------------------------------------------ [2007-04-27 17:33:54] DPP <paul dot dovbush at gmail dot com> Forgot to say: file contain russian text encoded in UTF-8. Without PCRE_UTF8 modifier regexp falls on russian letter "R". ------------------------------------------------------------------------ [2007-04-27 17:26:59] DPP <paul dot dovbush at gmail dot com> Description: ------------ Parsing file with 10000 lines of following format: level + delim + [@xref_id@ + delim +] tag + [delim + line_value +] terminator level digit delim space xref_id alphanum tag alpha (english) line_value any (except terminator) terminator \r\n With regexp: $c=preg_match_all("/^\s*(\d+)\s+(@(\S+)@\s+)?(\w+)(\s+@(\S+)@\s*|.*)?$/Sm",$fp,$m,PREG_PATTERN_ORDER); Setting PCRE_UTF8 modifier slows whole script down 30 times (from 300ms to 9000ms). May be more accurate regexp here will be $c=preg_match_all("/^ *(\d+) +(@([^@\\n]+)@ +)?([^ \\n]+)( +@([^@\\n]+)@ *| +[^\\n]*)?$/m",$fp,$m,PREG_PATTERN_ORDER); But it changes nothing. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=41216&edit=1