Haskell Platform proposal: Add the vector package

Johan Tibell johan.tibell at gmail.com
Tue Jun 19 01:13:52 CEST 2012

On Mon, Jun 18, 2012 at 4:09 PM, Roman Leshchinskiy <rl at cse.unsw.edu.au> wrote:
> ForeignPtrs can be unpacked, just not manually (which is a GHC bug, IMO, I should report it):
> data Vector a = Vector {-# UNPACK #-} !Int
>                       {-# UNPACK #-} !(ForeignPtr a)
> ByteString just has some room for optimisation here ;-)

I probably just remembered the ByteString optimization incorrectly. My
apologies. I think the Addr# field was moved to the top of ForeignPtr
(not to the PS constructor itself) to support unpacking.

-- Johan

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