Improve performance tests of core

[artgoldberg]

evaluate additional simulation applications make and record replicated runs with each number of sim objs separate from unittests

Automatically: retain results with commit tag graph results with distributions across replicated runs

[artgoldberg]

move this issue to desim (de_sim) repo

[artgoldberg]

Done: Automatically retain results

[artgoldberg]

Could also measure performance of a DES benchmark, like HOLD, from which PHOLD is derived.