[GHC] #13982: HEAD GHC+Cabal uses too much memory

15 Jul 2017


      #13982: HEAD GHC+Cabal uses too much memory
-------------------------------------+-------------------------------------
           Reporter:  mniip          |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  libraries      |           Version:  8.3
  (other)                            |
           Keywords:                 |  Operating System:  Linux
       Architecture:  x86_64         |   Type of failure:  Runtime
  (amd64)                            |  performance bug
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 If you install GHC HEAD and bootstrap cabal "2.0.0.0" as submoduled in
 that, whenever installing any packages cabal will hang for minutes before
 dependency resolution and will eat about 10 gigabytes of memory.

 I did a simple profile,

 {{{

 COST CENTRE                                 MODULE
 SRC                                                 %time %alloc
 packageListFromCache.readPackageDescription Distribution.Client.IndexUtils
 Distribution/Client/IndexUtils.hs:(714,5)-(722,61)   95.7   99.4
 }}}

-- 
Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13982
GHC http://www.haskell.org/ghc/
The Glasgow Haskell Compiler