Deployment: ev vs. event, what happens when both are installed?
In [this page](http://socketo.me/docs/deploy), Mr. Boden states that 

> No further setup is necessary; if either of these extensions is present, the evented I/O loop toolkit used by Ratchet will automatically utilize them, which will drastically improve concurrency.

My questions are:
1) What happens when both ev and event extension are installed? Does Ratchet randomly pick one or it has a preferred extension?
2) How do I know that either ev or event is being used by Ratchet? There are a few Gist on how to install ev/event, usually both. They seem right, but it will be great if there is a way to make sure the extension is successfully installed.

Thanks.