[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:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.7
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #8082             |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by George):

 re Simon PJ's and Simon Mar's comment , we don't quite know that that
 better alignment would improve speed at the cost of binary size , but the
 Intel documentation is a pretty strong hint that it proably will and is
 thus worth checking out, right? Couldn't we break this into two tasks:
 First to provide a patch with instructions on how to apply it e.g. to
 8.6.1 or head or whatever and a task to benchmark the resulting compiler.
 The benchmarking task could be done by people with much less, or at leasts
 different, expertise than it takes to produce such a patch right?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8279#comment:29>
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