WebApi vs SignalR

http://www.telerik.com/blogs/async-data-with-signalr

https://blogs.perficient.com/microsoft/2014/02/mvc-controller-actions-vs-web-api-vs-signalr-what-to-use/

http://www.asp.net/signalr/overview/getting-started/tutorial-server-broadcast-with-signalr

http://programmers.stackexchange.com/questions/262045/is-performance-the-only-reason-not-to-use-signalr-websockets-entirely-in-lieu

http://stevescodingblog.co.uk/real-time-system-resource-monitor-with-signalr-mvc-knockout-and-webapi/

http://www.sitepoint.com/build-real-time-signalr-dashboard-angularjs/