[GHC] #14980: Runtime performance regression with binary operations on vectors

[GHC]

#14980: Runtime performance regression with binary operations on vectors
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        Reporter:  ttylec            |                Owner:  bgamari
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:  vector
                                     |  bitwise operations
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by tdammers):

 Speaking of clean slates; I just noticed that `$PATH` can mess up the
 testing, because stack defaults to installing binaries into
 `~/.local/bin/`, while cabal installs either into `~/.cabal/bin` (if no
 sandbox is used), or into `./.cabal-sandbox/bin` (if a sandbox is used).
 So you have to be careful to make sure you're running the correct binary,
 and just relying on `$PATH` might explain while switching between
 configurations or build tools might appear to leave some residue.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14980#comment:19>
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