Sample output:

Indexing done at 2017-02-24 17:35:31.979
  Located 185 indexables in 34ms
  Collected garbage from 185 files in 3ms, average time = 0.016ms
  Tested 185 fingerprints in 2746ms, average time = 14.843ms
  Indexed 216326 classes (from 185 files containing 1111.66MiB) in
244358ms, average time per class = 1.13ms
  Cache misses = 191345 (0.011%)
  Reads = 747.441MiB, writes = 9661.555MiB
  Time spent performing flushes = 17269ms (6.985%)
  Total indexing time = 247244ms
Allocated size: 1213.785MiB
malloc'ed: 660.041MiB

Change-Id: I6444606199644bb179bd53e11946edb45b0ab8aa