Check out the "Time Profiling" of the Chapter 25 of Real World Haskell [1] for a detailed explanation. -deech [1] http://book.realworldhaskell.org/read/profiling-and-optimization.html On Wed, Dec 29, 2010 at 6:48 PM, Aaron Gray wrote:

What are these comments for in Happy ?     {-# SCC "Mangler" #-} Many thanks in advance, Aaron

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