#4184: Squirrelly inliner behaviour leads to 80x slowdown
--------------------------------------+-------------------------------------
Reporter: bos | Owner:
Type: bug | Status: closed
Priority: normal | Milestone: 7.2.1
Component: Compiler | Version: 6.12.1
Resolution: invalid | Keywords:
Testcase: | Blockedby:
Difficulty: | Os: Unknown/Multiple
Blocking: | Architecture: Unknown/Multiple
Failure: Runtime performance bug |
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Changes (by simonpj):
* status: new => closed
* resolution: => invalid
Comment:
OK I looked at this. After an hour I realised that you have written
{{{
{- INLINE uniform #-}
}}}
rather than
{{{
{-# INLINE uniform #-}
}}}
so your alleged INLINE pragma is being ignored as a comment. As Roman
says, this kills your performance.
Incidentally, you don't need that weird f any more, if you ever did. It's
enough to say
{{{
uniform = uniform2 wordsToDouble
{-# INLINE uniform #-}
}}}
So I'll close this. But please re-open if it doesn't work.
It's unfortunate that a mis-typed pragma just looks like a comment!
Oh, take note of #4310, which describes a workaround to package `vector`
that will be needed for a while.
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4184#comment:8>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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