I read on somewhere in web applications Python is way way slower than PHP and at the last of the list there was Java. However, as I said all the users can see a

I read on somewhere in web applications Python is way way slower than PHP and at the last of the list there was Java. However, as I said all the users can see at first I think is speed. If I can catch quick web application with my all needs in PHP, why should I write in Python ?