[loxias]

I really like this, OP. I'm member of the clan "why are you creating your own XDR, just use sqlite!!" and have oft jumped to that in technical discussions, so appreciate it.

However, what's lacking from something like this is a detailed bill of the cost. I'd love to see some, any benchmark on a DB with > 10^6 edges to see how it goes. That's the other hand of the equation "just use sqlite and be happy" -- the expectation that performance will actually be reasonable.