Parsing speed difference between " and '

Hi, I believe this is the correct list to talk about that as it's Zend/parser-related. I'd like to know if there's a difference between parsing: require ('foo.inc'); and require ("foo.inc"); If so, which one would be faster and why ? I didn't find many references about this in the FAQ or the documentation and even this page mixed both " and ': http://www.php.net/manual/en/function.require.php I read such a thing on the following Webmail client documentation: http://www.squirrelmail.org/wiki/CodingGuidelines -- Olivier.Cahagne@epita.fr