This presentation has been given at PHPTour'17 (AFUP, Nantes, France), http://event.afup.org/phptournantes2017/programme/?lang=en#2034.
During this talk, Tagua VM has been introduced as a new experimental PHP Virtual Machine.
Record on Youtube: https://www.youtube.com/watch?v=Ymy8qAEe0kQ (in French).