Speed benchmakrs

[pedroramaciotti]

Create speed benchmarks using random HIN generators.

This should include:

• Bipartite 1000x1000, with 10e1, 10e2, 10e3, 10e4, 10e5, and 10e6 edges .
• Fixed density bipartite NxN for growing N.

[pedroramaciotti]

Track also memory usage.