Interesting!  I've pasted your msg into a feature request!

http://hackage.haskell.org/trac/ghc/ticket/849

Simon

| -----Original Message-----
| From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
| On Behalf Of Duncan Coutts
| Sent: 08 August 2006 13:47
| To: GHC-users list
| Subject: wislist item: more control over branch prediction
| 
| 
| So now that GHC is so good at producing really fast low level code
(see
| ByteString benchmarks) we start to encounter low level gubbins where
to
| get the fastest possible code we need slightly more influence over
| branch prediction.
| 
| In the code for ByteString's 'writeStrUp/Dn' functions we're doing a
| tight loop writing bytes to memory.

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