Typechecker performance regression 6.12 -> 7.0.1
The attached module is a smaller version of the example in #4505.
With GHC 6.12.3 it takes 4s to compile (x86_64/Linux), whereas with 7.0.1 it takes 282s. HEAD seems about the same as 7.0.1.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.0.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | high |
| Resolution | Unresolved |
| Component | Compiler (Type checker) |
| Test case | |
| Differential revisions | |
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| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |