[GHC] #10067: The Read Integer instance is too slow

[GHC]

#10067: The Read Integer instance is too slow
-------------------------------------+-------------------------------------
        Reporter:  redneb            |                   Owner:
            Type:  feature request   |                  Status:  patch
        Priority:  low               |               Milestone:
       Component:  Core Libraries    |                 Version:  7.11
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:  Phab:D645
-------------------------------------+-------------------------------------

Comment (by redneb):

 One problem with `Natural` is that it does not follow the conventions of
 other numeric types. For example, the `Show` instances of all other types
 are given in `GHC.Show` and the `Read` instances in `GHC.Read`, while for
 `Natural` all instances are declared in `GHC.Natural`.

 Herbert, do you have any objection moving the `Read Natural` instance to
 `GHC.Read`? This will make it easier to treat `Natural` like any other
 type in the future.

 Otherwise, there will be an module import cycle and will require an hs-
 boot file.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10067#comment:6>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler