[fc417fc802]

> the pattern is to resize() and shrink_to_fit(),

As someone who primarily writes C++ I would not expect that to work. I mean it's great if it does I guess (I don't really see the point?) but that would honestly surprise me.

I would _always_ expect to use >= for capacity comparisons and I don't understand what the downside would be. The entire point of these data structures is that they manage the memory for you. If you need precise control over memory layout then these are the wrong tools for the job.