[GHC] #4963: Faster implementation of System.Timeout.timeout

[GHC]

#4963: Faster implementation of System.Timeout.timeout
---------------------------------+------------------------------------------
    Reporter:  basvandijk        |       Owner:                
        Type:  task              |      Status:  new           
    Priority:  normal            |   Component:  libraries/base
     Version:  7.0.1             |    Keywords:                
    Testcase:                    |   Blockedby:                
          Os:  Unknown/Multiple  |    Blocking:                
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown  
---------------------------------+------------------------------------------
 As described in the
 [http://www.haskell.org/pipermail/libraries/2011-February/015876.html
 thread] on the libraries list I wrote a faster implementation for
 `System.Timeout.timeout`.

 Attached are a patch for base and a tiny Criterion benchmark that compares
 the current `timeout` with the new one.

 The patch does need some careful review!

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4963>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler