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  • Glasgow Haskell CompilerGlasgow Haskell Compiler
  • GHCGHC
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  • #13253
Closed
Open
Issue created Feb 09, 2017 by Oleg Grenrus@phadejDeveloper

Exponential compilation time with RWST & ReaderT stack with `-02`

See the attached file. The compilation time grows exponentially with additional fields in HuteStruct. Tried with GHC-8.0.1 and quite recent HEAD (8.2)

adding a field doubles the compilation time with -O2.

  • 9: 17s
  • 10: 34s
  • 11: 83s on my machine. With -01 around 3sec, independently of the struct size.

The original issue: https://github.com/yesodweb/yesod/issues/1348

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Version 8.0.1
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
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