This talk's slides have a good summary of how much overhead was reduced: http://www.slideshare.net/nikita_ppv/php-7-what-changed-internally-php-barcelona-2015 h

This talk's slides have a good summary of how much overhead was reduced: http://www.slideshare.net/nikita_ppv/php-7-what-changed-internally-php-barcelona-2015 http://www.slideshare.net/nikita_ppv/php-7-what-changed-inte...