782440 - Optimize CSS3 Flexbox for use-cases with one flexible item

Status: ASSIGNED

(Core :: Layout, defect)

Description

[Daniel Holbert [:dholbert]]

Quoting dbaron from bug 666041 comment 97:
> So a few thoughts on things that should be followups after the initial
> landing:
> 
>  (1) I think it's pretty important to optimize for the case of only
>      one thing being flexible.  I think one reasonably common use
>      case will be using flexbox for layouts not unlike a browser
>      window -- a bunch of stuff in the middle taking most of the space,
>      with some UI around the edges.  In these cases, we'll want to
>      make sure to skip the intrinsic sizing work for the piece
>      in the middle when it's avoidable.