phpDay 2015
15 - 16 May 2015 at Hotel San Marco, Verona, Italy

Quick and complete overview and comparison of known available methods to exucute PHP processes in parallel for scaling and maximize cpu utilization. Thx

Very informative and quality talk.

Very inspiring talk. Before this talk I already find myself a tutor, but after the talk I want to also be a tutor and for juniors.

Also I am very motivated to blog more now. From my perspective this was a great motivating talk. Thank you very much.

slides link has been added, for every other questions: http://twitter.com/inmarelibero

thanks @Vittore and @francesco

Useful, practical and clear talk. One of the best at conference.

Very interesting talk. Speaker motivate me to learn more and to try using Hack.

Great and interesting talk. I've really liked speakers demos.

Thanks for the feedback guys.
The talk's title wanted to highlight that, while your acceptance test is still failing, you write different specification tests and do a parallel TDD cycle with them. So "concurrency" here is because you are writing tests in "parallel" and because you are using multiple test frameworks at the same time in order to test the same layer of the application.
Nevertheless, if it was so misleading, I'll change it next time ;)