Support for page/resource size

Hi guys

I'm new to the way that this group works, so if there is a better way to
approach this please let me know.

I see that the v2 specs for NavigationTiming and ResourceTiming are in
progress and I'm interested in knowing whether there has been any
consideration to including the size of the page/resource in the API?

I work on profiling/debugging tools, and the timing information is great,
but it would be amazing if we could start pulling together a profile of the
weight of the page.

I guess other things come into play when starting to go in this direction
(like status codes, from cache, etc) but just wanted to know if anyone is
thinking about this.

Cheers
Anthony