Compiling DynFlags is jolly slow
Compiling DynFlags really takes a long time these days.
Ian thinks that it's due to the Read and Show instances he has added (see attached W2.hs.
Simon M suggests: instead of using Read/Show, you could generate some code in mkDerivedConstants to use ReadP and Outputable, which should be much smaller and faster.
This ticket is
- To see if we can speed up compilation of
DynFlags - To check WHY it is so slow. Are there any lessons we can learn or ways to make it compile faster? Is it tickling some asymptotically-bad corner of the compiler?
Simon
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.6.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |