A service that converts a package into a DLL and manifest
Webpackbin needs an external bundle of NPM packages. This keeps the webpackbin bundle very fast to rebundle and the external NPM packages bundle, called the DLL, is cached forever. When webpack-dll receives a request for bundling it looks something like: /react@15.0.2+react-dom@15.0.2/manifest.json. Though it could also be: /react@15.0.2+react-dom@15.0.2/dll.js. The point is that the first request that hits the service will start the bundle process, while the other request will stay in pending mode until the bundle is done.
In production mode this service sits behind www.jsdelivr.com. It caches the bundles for around a year and will instantly respond with later requests to same urls.
The service caches latest packages as the CDN has multiple endpoints and "POPs". This will allow for fast distribution for a period of time. The redis cache just expires oldest keys. It will handle 25MB of cache currently. You need Redis locally to run this service.