Brat code (with LuaJIT) beats Ruby code (implemented in C) for first time evar?

Every day I'm shufflin'

In place shuffle of 1,000,000 item array over 10 runs. Brat code "precompiled" to Lua.

         Brat | Ruby
        ------|------
Best    .033s | .048s
Median  .043s | .049s
Worst   .046s | .052s

shuffle.brat

#* http://rosettacode.org/wiki/Knuth_shuffle
  Shuffle an array (in-place)
*#

shuffle = { a |
  (a.length - 1).to 1 { i |
    random_index = random(0, i)
    temp = a[i]
    a[i] = a[random_index]
    a[random_index] = temp
  }

  a
}

shuffle 1000000.of 1

shuffle.rb

# Fastest way to make a big array?

Array.new(1000000, 1).shuffle!