Mach vs FeathersJS

Mach has some pretty cool streaming functionalities built directly into it, if your web app provides any audio/video/data streaming features, you can consider using Mach to build it.

Since Mach already is asynchronous (stateless) which means your logic is implemented by using promises (then objects); hence your functions are pretty independent and composable.

No complex layers between plain HTTP requests and the corresponding JS functions invoked. Which in turn means each GET/POST/PUT or any other HTTP request is directly mapped to a Javascript function. Hence leading to a huge increase in performance for your app

One of the distinguishing features of Mach is it's robustness, errors won't be terminating your complete app, instead they'll bubble up so you can handle them gracefully.

Like most of the Node.js's core, Mach is an asynchronous web framework too. Each response (of a request) can simply be hooked up to a then method so that its result or the reason for failure can be retrieved after the action is complete. If you're wondering what async operations are, here's a pretty good explanation for you

Feather can sync events happening in two different Node processes or even servers in real-time. For example: an event happens in server A, the user connected to server B is instantly notified of that event.

This is done through a central Redis or Mongo collection or through a websocket libraries' clustering library.

Through services, Feathers provides instant CRUD functionality, it also can easily expose a RESTful and real-time API through HTTP/HTTPS and websockets.

Since Feathers itself is built on top of Express (it's a thin wrapper over socket.io, primus and Express) and because of Feathers' highly modular nature, it's very easy to integrate Feathers in an existing Express project.

Feathers makes extensive use of modules (which are called Feathers services). These services work like ExpressJS middleware and can be used with app.use('/path', serviceObject).

Services help developers keep their applications modular and as minimal as possible, without any unnecessary libraries or bloat.

FeatherJS uses primus which is a universal wrapper for real-time frameworks. Through primus you can easily choose which socket transport you want to use.