[GHC] #9520: Running an action twice uses much more memory than running it once

[GHC]

#9520: Running an action twice uses much more memory than running it once
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        Reporter:  snoyberg          |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.8.3
      Resolution:  invalid           |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
 Type of failure:  Runtime           |  (amd64)
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #8457             |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by edsko):

 Sure. Article is now published at http://www.well-typed.com/blog/2016/09
 /sharing-conduit/ . It discusses all the issues mentioned in this ticket
 (including, as a bonus why prof-auto has the effect it has :). As
 requested will also add a link in the ticket description.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9520#comment:15>
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