GraPHP vs. Tornado vs. Yii

The goal of this project is to build a lightweight web framework with a graph DB abstraction. It should be very easy to create the graph schema with no knowledge of of how the data is stored. Also, the schema should be incredibly flexible so you should never need migrations when adding new models (nodes), connections (edges), or data that lives in nodes.

By using non-blocking network I/O, Tornado can scale to tens of thousands of open connections, making it ideal for long polling, WebSockets, and other applications that require a long-lived connection to each user.

Yii comes with: MVC, DAO/ActiveRecord, I18N/L10N, caching, authentication and role-based access control, scaffolding, testing, etc. It can reduce your development time significantly.