...database with tens of millions of small nodes containing typically around 8-64 bytes of...

...I see is a graph database, with nodes sometimes being code, types, sometimes data, other...

...unittests alone (but still present as AST nodes with no
	  semantic run). Basically, module abc...

...constructing AST nodes.

I think this really comes down to taste.

However AST nodes seem...

...Add, Remove, erase are implemented here ...
}

The nodes are only allocated over malloc(). So i...

...apparently to have `popBack` stop before reaching nodes that have already been `popFront`ed. I...

...and tail will point to the same nodes and you are setting the head.prev...

...On a higher level, though, specifying individual nodes may not always be desirable (e.g...

...changes* in the remote nodes, NOT the *total* number of nodes.

Similarly, for deployment management...

...C++) class Node
{
    extern(D):
    void foo(Node[] nodes) {}
}

Is a struct not an option?