Sinatra `time rake spec` with therubyracer vs. mini_racer

bench.md

therubyracer

Finished in 18.184895s, 58.8400 runs/s, 130.3829 assertions/s.

1070 runs, 2371 assertions, 0 failures, 0 errors, 0 skips

real    0m25.964s
user    0m11.628s
sys     0m2.011s

mini_racer

Finished in 19.718860s, 53.9078 runs/s, 119.4795 assertions/s.

1063 runs, 2356 assertions, 0 failures, 0 errors, 0 skips

real    0m26.994s
user    0m12.599s
sys     0m2.188s