Help to improve speed

[Jacob Carlborg]

I have an application that maps numbers to words from a list of words 
written in Ruby. I've ported the application to D and it's terrible slow 
  and I don't know why. With a file of around 60 000 words and a file 
with around 25 000 numbers the Ruby application takes around 3 seconds 
and my D port takes around 209 seconds to finish. It's probably not well 
coded, I just tried to port it but over 200 seconds longer doesn't feel 
right.

I've attached the Ruby and D files.

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