Module loading and Apache mod-php performance

When using loadable modules such as geoip, is there a performance hit to always loading the module in php.ini ? In other words, is there a performance advantage to using dl() if the module in question is not used very often ?

BTW, I am aware dl() has been removed in PHP 5.3, just wondering about the performance implications 开发者_C百科should we decide to remove this function from our code base.

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dl() makes no sense. PHP can control modules on the fly without lose performance, so loading with dl() has no more sense - I see dl() only as a facility way to load modules.

Ok, some people will be angry because shared hosts cannot gain access to php.ini to their users, but anyway...