#12790: GHC 8.0.1 uses copious amounts of RAM and time when trying to compile
lambdabot-haskell-plugins
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Reporter: clint | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 8.0.1
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):
Wiki Page: |
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Comment (by RyanGlScott):
There's quite a difference between the generated Core for `list` depending
on whether `-fprof-auto` is on or not. With `-fprof-auto`, we have:
{{{#!hs
-- RHS size: {terms: 2, types: 0, coercions: 0}
list :: Parser Expr
list =
Lambdabot.Plugin.Haskell.Pl.Parser.list_go1
Lambdabot.Plugin.Haskell.Pl.Parser.list1
-- RHS size: {terms: 3, types: 11, coercions: 10}
Lambdabot.Plugin.Haskell.Pl.Parser.list1
:: [Text.Parsec.Prim.ParsecT
[Char] () Data.Functor.Identity.Identity Expr]
}}}
But without `-fprof-auto`, we have:
{{{#!hs
-- RHS size: {terms: 1, types: 0, coercions: 7}
list :: Parser Expr
list =
Lambdabot.Plugin.Haskell.Pl.Parser.list1
`cast` (Sym
(Text.Parsec.Prim.N:ParsecT[0]
<[Char]>_R <()>_R