Loading of geoipcity.inc adds about 30ms to response time on my Windows 7 machine. For example loading facebook PHP API adds only 5ms to the response time. I know its not a lot but since I only need geoip.inc for countries it would be nice if I could only include geoipcity.inc if I really need it. You could maybe put in your documentation that if user wants this he should add it to his composer.json autoload section.