[GHC] #14161: Performance Problems on AST Dump

[GHC]

#14161: Performance Problems on AST Dump
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           Reporter:  h4ck3rm1k3     |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  low            |         Milestone:
          Component:  Compiler       |           Version:  8.3
           Keywords:                 |  Operating System:  Linux
       Architecture:  x86_64         |   Type of failure:  Compile-time
  (amd64)                            |  performance bug
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 Using the latest self compiler ghc

 ghc -O -ddump-to-file -ddump-parsed-ast

 with the file
 https://raw.githubusercontent.com/h4ck3rm1k3/gcc-
 ontology/master/tests/example_python_ast_in_haskell.hs

 After 2 hours I stopped it :
 PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
   20   0  1.000t 0.014t      0 D   3.3 94.0 108:29.80 ghc

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14161>
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