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base repository: NixOS/nixpkgs
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head repository: NixOS/nixpkgs
compare: fee149b8bd01
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  • 2 commits
  • 1 file changed
  • 2 contributors

Commits on Aug 27, 2018

  1. More conservative SCC tagging for Haskell libraries 

    `all-functions` corresponds to `-fprof-auto` which places an SCC on every binding. It is well known that SCCs hinder GHC from doing its optimization magic and really slows down profiled code to a point where the profiling reports are completely skewed towards things that were completely optimized away in production settings. Concretely this shows up with things like lenses which do not carry runtime overhead when properly simplified.

`exported-functions` corresponds to GHCs `-fprof-auto-exported` which doesn't put SCCs on `INLINE`d code and in turn doesn't influence simplification of this basic but important stuff.
    @alexbiehl
    alexbiehl authored and Alex Biehl committed Aug 27, 2018
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Commits on Sep 3, 2018

  1. Merge branch 'haskell-updates' of git://github.com/alexbiehl/nixpkgs … 

    …into haskell-updates
    @shlevy
    shlevy committed Sep 3, 2018
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