To use Facebook Javascript or not
I would think newsfeed, but if there is a difference, it's very small.
I'm planning to start a web app that uses the Facebook Python SDK. I found two examples in the sdk, newsfeed and oauth. Since im going to deploy  the app at google appengine I'm confused to choose which one to base my project. The oauth example uses OAuth 2.0 directly and the newsfeed example rely on the cookie saved by the Facebook Javascript SDK to get the user id of active user. Which one of the two examples will you prefer if you want your app to be less cpu intensive?