➜  perftest profiler 'User.first' --runs 3
Run options: --seed 6585

# Running:

ProfilerTest#test_pzzuser_first (35 ms warmup)
        process_time: 13 ms
              memory: 0 Bytes
             objects: 0
.

Finished in 1.732627s, 0.5772 runs/s, 0.0000 assertions/s.

1 runs, 0 assertions, 0 failures, 0 errors, 0 skips

ruby 2.1