Retypechecking the loop in --make mode is super-linear when there are many .hs-boot modules
At time of writing master is at commit 14457cf6.
In GhcMake.hs, both upsweep and parUpsweep call getModLoop for each module. getModLoop is (at least) linear when called on a .hs-boot ModSummary. See comments in Phab:3646.
This isn't a big deal in practice, since .hs-boot modules are uncommon, but it does irk me, and it will be easy to fix. Fixing this would also be an opportunity to de-duplicate some logic in upsweep and parUpsweep.
ccing niteria as he has worked with this code recently.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.3 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | niteria |
| Operating system | |
| Architecture |