I believe that we statically allocate all ASCII chars, and Ints between -16 and +16. Have a look in ghc/rts/StgMiscClosures.cmm Simon ________________________________ From: haskell-cafe-bounces@haskell.org [mailto:haskell-cafe-bounces@haskell.org] On Behalf Of Monique Monteiro Sent: 22 January 2006 23:26 To: haskell-cafe@haskell.org Subject: [Haskell-cafe] GHC integers pre-allocation Hi all, does anyone know if GHC implements any kind of pre-allocation of integers/caracteres ? If yes, which range of values does it use? Thanks in advance, Monique Monteiro