[GHC] #14490: TTG Snags

[GHC]

#14490: TTG Snags
-------------------------------------+-------------------------------------
        Reporter:  alanz             |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #14482            |  Differential Rev(s):
       Wiki Page:                    |
  ImplementingTreesThatGrow          |
-------------------------------------+-------------------------------------

Comment (by Shayan-Najd):

 > Splitting the HsInstances.hs file in 2, as per ​
 > https://github.com/ghc/ghc/tree/wip/ttg5-data-2017-11-17 reduces the
 memory requirement
 > for each, but shows up #14482, where there is a linker failure due to
 incorrectly
 > processing boot files.

 It seems that #14482 is fixed. If yes, then what's the compile-time of GHC
 itself in
 this branch?

 > It may not be instance generation at all.
 Can we somehow time the constraint solver, before and after the patches?

 Can we try Plan B and time it? (That is: instead of one Data instance for
 the HsSyn traversals, make three.)

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14490#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler