On 16.03.2012 17:41, Felipe Almeida Lessa wrote:
Does anyone have any ideas why GHC is inlining so much code everywhere? While everything I said here was tested on GHC 7.0, we have evidence that GHC 7.4 suffers from the same problem. We don't know about GHC 6.12, though. This seems to be a problem for everyone who uses text, which we hope is everyone using Haskell ;-).
Disclaimer. I'm no expert in text internals. Because it's told to do so. This is an unfortunate feature of stream fusion. It does eliminate intermediate data structures but it requires that everything is inlined. It looks like most of the code comes from unstream[1] function. I'm not sure that unstream has to be inlined. I suppose yes so stepper function is inlined. [1] https://github.com/bos/text/blob/master/Data/Text/Fusion.hs#L95