Wide set of expressions can convert to compiled functions. Expressions can even include definite integrals.
Hope it helps for others who want really speedup calculations in maple as much as possible for now.

ex.mw

Checked under 15.01 version

Please reconsider order of messages in posts acorrding to option reply. I don't understand why my answer

http://www.mapleprimes.com/questions/127969-Encapsulated-Transformation-Of-Expression

( Moments ago by to Axel Vogt) appears at the end of list instead to be in that branch where it should be.

I also know that branch menu is completly for other purposes, not for this.