lookdangerous

From a conversation with a friend; how many operations happen when I open Facebook on my phone?

From battery management, to process scheduling, permissions, object instantiation, logging, authentication, requests, responses, rendering, and so on.

From the time I click the Facebook icon to the time the app is loaded and responsive, did a hundred things happen? A thousand? A million, or more?

It is a bit of a challenge to even range this question- you would reasonably consider individual processor instruction- but there are hardware behaviors, many for each instruction, to consider too. Perhaps processor instructions would be a fine place to start.