22 Dec
2007
22 Dec
'07
4:44 p.m.
On Sat, Dec 22, 2007 at 04:40:00PM -0500, Sterling Clover wrote:
I'm curious if you get the same performance difference importing GHC.Listinstead of Data.Char? I chased some dependencies, and Data.Char imports GHC.Arr, which in turn imports GHC.List, which provides a bunch of fusion rules pragmas that would probably optimize your (++) usage. If this is the case, not sure if its a bug or not, but all this will have to be thought through as more stream fusion is rolled out anyway, I suspect? --S
The Prelude imports GHC.List, iirc. Stefan