[GHC] #8852: 7.8.1 uses a lot of memory when compiling attoparsec programs using <|>

[GHC]

#8852: 7.8.1 uses a lot of memory when compiling attoparsec programs using <|>
-------------------------------------+-------------------------------------
              Reporter:  joelteon    |            Owner:
                  Type:  bug         |           Status:  closed
              Priority:  normal      |        Milestone:
             Component:  Compiler    |          Version:  7.8.1-rc2
            Resolution:  fixed       |         Keywords:
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Unknown
       Type of failure:  Compile-    |       Blocked By:
  time performance bug               |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------

Comment (by simonpj):

 Can you not just switch off `SpecConstr`?   But in principle, yes, if
 there is user pressure, we could push out 7.8.4

 Simon

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8852#comment:9>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler