[GHC] #8279: bad alignment in code gen yields substantial perf issue

[GHC]

#8279: bad alignment in code gen  yields substantial perf issue
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        Reporter:  carter                   |            Owner:
            Type:  bug                      |           Status:  new
        Priority:  high                     |        Milestone:  7.10.1
       Component:  Compiler                 |          Version:  7.7
      Resolution:                           |         Keywords:
Operating System:  Unknown/Multiple         |     Architecture:
 Type of failure:  Runtime performance bug  |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:  #8082
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Comment (by simonpj):

 If we knew that better alignment would improve speed at the cost of binary
 size (something that might differ across different architectures), that
 would be more motivation for a flag `-fchoose-speed-over-binary-size`.
 Another project for someone!

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8279#comment:17>
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