You used epoll to fetch this blog post. For almost anything you do on the Internet the server will be running Linux and it will use epoll to receive and answer your request in a timely and affordable manner. epoll is what makes Go such a great language for writing server software. Here is epoll in Go’s netpoll. epoll is what makes nginx the most popular web server in the world (this blog runs nginx). Here is nginx’s use of epoll. and it is often what we mean when we say ‘async’ in most programmi...