PHP by a mile. It's performant. It has bad rep for its history. But every release makes it better. And it has a nice model of architecture where the whole app

PHP by a mile. It's performant. It has bad rep for its history. But every release makes it better. And it has a nice model of architecture where the whole app is setup and tear down with every request in most scenarios. Your whole app is a response object. There are nice, mature frameworks like Symfony or Laravel that make it really pleasant to use. Pair with FastCGI and nginx and you can have a real killer.