On Monday, 27 November 2017 at 18:32:39 UTC, Ola Fosheim Grøstad wrote:
> You get this:
>
> shared_ptr -> control_block -> object
>

Actually, seems like the common implementation uses 16 bytes, so that it has a direct pointer as well. So twice the size of unique_ptr.

And 2k18 passes and there will be no precise gc this year it seems.
Great D language. Better to think to move from it away.