Slow type checking of type-level computation heavy code.
It seems we encountered a highly non-linear complexity in type checking.
I attached a "simple" program that produces the effect.
The time needed to load complete file in ghci depending on number of lines in longCompilingProgram:
- 4 lines - 2 secs,
- 8 lines - 10 secs,
- 12 lines - 27 secs,
- 16 lines - 59 secs.
time = 0,0156lines^3^ - 0,0937lines^2^ + 1,375lines - 3
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.0.2 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler (Type checker) |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information