I believe Java, PHP and C++ are the most common platforms for sites built between 10 and 5 years ago, with the exception of Douban.com (where I work) which is P

I believe Java, PHP and C++ are the most common platforms for sites built between 10 and 5 years ago, with the exception of Douban.com (where I work) which is Python. There is a lot of scaling issues and challenges, and some discussion about it during tech conferences. I attended a QCON in Beijing last years and half of the talks where about just that. If you have more precise question you can PM me.