Barrapunto

Exactamente. Como ejemplo yourporn.com: http://highscalability.com/blog/2012/4/2/youporn-t argeting-200-million-views-a-day-and-beyond.html [highscalability.com]

• 100 million page views a day in 2008
• 300K queries / sec
• 100 Gb/s - 3 full DVDs streamed every second
• Logs 8GB-15GB of data per hour

Symfony - fast and feature rich, comes with a large set of libraries.

• Considers Symfony2 + Redis = Rapid Development + Scalable Website - a well balanced equation.
• Loves dependency injection.
• Choosing a web framework doesn't mean killing performances as long as you use a solid architecture in front of it.