Macbook Pro:

  ~/felix>flx --test=build/release --static mt
  ~/felix>time ./mt

  real	0m0.004s
  user	0m0.001s
  sys	0m0.002s

  ~/felix>time ../lua-5.2.1/src/lua mt.lua

  real	0m0.006s
  user	0m0.001s
  sys	0m0.003s