How to read performance logs?

Summary:

How do I read the performance logs that CPQ provides?

Content (please ensure you mask any confidential information):

The logs are somewhat confusing and there is no instructions on how to interpret them. For example, take these logs:

Why are there so many logins? I'm sure the user isn't constantly logging in between every other action they perform. Are these tied to specific actions? what is RATS? what is ACTIONS ":_interact"? and why are all the browser times empty?

Take this other set of logs:

What does each event type mean? and since most "Actions" are not even named, how do I know what exactly what each entry is associated to? For example, take line 278. How do I associate this event to a particular BML script?