[GHC] #10818: GHC 7.10.2 takes much longer to compile some packages

[GHC]

#10818: GHC 7.10.2 takes much longer to compile some packages
-------------------------------------+-------------------------------------
        Reporter:  kazu-yamamoto     |                Owner:
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:
       Component:  Compiler          |              Version:  7.10.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by j.waldmann):

 Yes it's not clear (to me) what the travis timing data actually measures.
 I was hoping it's CPU time allocated to the build process. Of course if
 it's wall clock then all bets are off. Or, if time includes waiting for
 the cabal downloads ...

 > 3 sec for obdd

 Really. On my local machine, more like 30 seconds (single-threaded build)

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10818#comment:8>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler