I have a sparse extra large directed graph with hundreds of millions of nodes, but the nodes have a max out degree and max in degree of 4 (most have out degree of 2 in fact). So it's quite sparse. I know that graphviz is a good choice but it only offers visualising without downsample which is obviously not a choice if the number of nodes is more than a hundred million.
Are there tools, preferably C/C++ based (because performance is of importance of course) that offer such visualisations?
I'm aware of similar questions asked on SO, like this or this but to me they sound like a different problem, both in terms of scale of the graph, its topology, and the technology.
