[GHC] #13564: Why does memory usage increase so much during CoreTidy?

[GHC]

#13564: Why does memory usage increase so much during CoreTidy?
-------------------------------------+-------------------------------------
        Reporter:  rwbarton          |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.1
      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):  Phab:D3516,
       Wiki Page:                    |  Phab:D3524
-------------------------------------+-------------------------------------

Comment (by MikolajKonarski):

 Isn't this ticket fixed? Is CoreTidy pass still leaking in 8.4? Or is the
 ticket dangling, because the in-code docs can be improved, as in
 https://phabricator.haskell.org/D3524#100418?

 I'm asking, because I'm trying to make #13586 more useful (split or narrow
 down).

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13564#comment:13>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler