GHC 7.10 complie time regression

[Kazu Yamamoto (=?iso-2022-jp?B?GyRCOzNLXE9CSScbKEI=?=)]

Erik,

>> no it's not expected to take "much longer".  Can you make a ticket with
>> a reproducible test case?
> 
> An make sure you are using ghc 7.10.2 and not 7.10.1 because 7.10.2
> had some signifcant fixes for these kinds of issues.

I'm certainly using GHC 7.10.2.

--Kazu