We should probably stick with the bison parser for now, at least until the lemon matches the speed of the existing solution.
On Mon, Nov 1, 2010 at 3:41 PM, Etienne Kneuss <col...@php.net> wrote: > 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 > > -- > PHP Internals - PHP Runtime Development Mailing List > To unsubscribe, visit: http://www.php.net/unsub.php > > -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: http://www.php.net/unsub.php
