Try a speed test for IndexedTable

[baltzell]

good for #756

[baltzell]

Good enough for now, from the unit test logs:

********************************************************************************************************************
*     BENCHMARK  RESULTS 
********************************************************************************************************************
*   TIMER (IT:GIV      ) : N Calls         9999,  Total Time  =         7.09 sec,  Unit Time =        0.710 msec   *
********************************************************************************************************************

[c-dilks]

Someday we should generalize these benchmark names, e.g., with this.getClass(); "IT:GIV" is a bit cryptic for an outsider. If benchmark pretty-printing is a concern, just publish a Markdown table and use the full benchmark name.