Graphlet Counting is slower than it should be.

[andeElliott]

For a graph that i am testing, it takes almost twice as long to generate the graphlets as it does to to count the orbits.

The underlying code converts from orbits to graphlets, so we just need to speed up the conversion. Timings:

Orbit Counts

tic(); q12 = netdist::count_orbits_per_node(G,4); toc()
0.379 sec elapsed
tic(); q12 = netdist::count_orbits_per_node(G,5); toc()
1.425 sec elapsed

graphlets Counts
tic(); q12 = netdist::count_graphlets_per_node(G,4); toc()
0.653 sec elapsed
tic(); q12 = netdist::count_graphlets_per_node(G,5); toc()
2.306 sec elapsed