Re: PHP 5.4: Rewriting of the parser into Lemon

On Nov 01 15:33:59, Derick Rethans wrote: > Hi! > > Work has been done on rewriting the PHP parser to Lemon in a specific > branch: http://svn.php.net/viewvc/php/php-src/branches/LEMON/ > > Right now, the Lemon parser is not actually faster than the current > bison parser, so I would suggest not to put this in PHP 5.4 until it > performs at least as well as the current parser. > > Are there any possibilities for optimisation so far? I'd make the guess that it is slower due to the rule decomposition that we had to do to match bison's "mid-rules" syntax. We could surely optimize the decomposition but it would require a lot of rewrite in zend_compile.c, which is quite tricky to do. > > cheers, > Derick > > -- > http://derickrethans.nl | > http://xdebug.org > Like Xdebug? Consider a donation: http://xdebug.org/donate.php > twitter: @derickr and @xdebug > > -- > PHP Internals - PHP Runtime Development Mailing List > To unsubscribe, visit: http://www.php.net/unsub.php > -- Etienne Kneuss http://www.colder.ch