Compiler space regression in 7.0.1 RC 1
There's a compiler space regresion in 7.0.1 RC 1. Seems to be around a factor of 2. Compiling WURFL-0.1
With a cut-down version, note the "<n>M in use":
$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 6.12.3
$ ghc --make WURFL -O -dshow-passes +RTS -t
[...]
<<ghc: 908052456 bytes, 1592 GCs, 7050782/13011048 avg/max bytes residency (15 samples), 31M in use, 0.00 INIT (0.00 elapsed), 1.11 MUT (1.28 elapsed), 0.91 GC (0.86 elapsed) :ghc>>$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 7.0.0.20100924
$ time ghc --make WURFL -O -dshow-passes +RTS
<<ghc: 973268040 bytes, 1699 GCs, 8225353/20188024 avg/max bytes residency (13 samples), 52M in use, 0.00 INIT (0.00 elapsed), 1.33 MUT (1.41 elapsed), 0.87 GC (0.94 elapsed) :ghc>>The Result sizes look comparable between the two compilers, so the next step is probably to try with a profiled compiler.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | high |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |