#1136: High memory use when compiling many let bindings.
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Reporter: igloo | Owner:
Type: compile-time performance bug | Status: new
Priority: high | Milestone: 6.8.3
Component: Compiler | Version: 6.6
Severity: normal | Resolution:
Keywords: performance | Difficulty: Unknown
Testcase: | Architecture: Unknown
Os: Unknown |
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Comment (by simonpj):
Interesting. I simplified it still more to a program of form:
{{{
a = let a0 = ()
in let a1 = a0
...
in let a10000 = a9999
}}}
and it still takes ages in the type checker, with a residency of 87M for
10,000 bindings. Splitting up the lets eliminates dependency analysis as
the problem (in the type checker at least).
Do you think you might do a little bit more profiling to see where the
typechecker/renamers costs are coming, for this simpler program?
Simon
Could
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1136#comment:8>
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