[GHC] #12706: Collecting type info is slow

[GHC]

#12706: Collecting type info is slow
-------------------------------------+-------------------------------------
        Reporter:  vshabanov         |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  GHCi              |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4459
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by bgamari):

 comment:7 should help significantly but there is still more to be done
 here.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12706#comment:8>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler