Issues · Glasgow Haskell Compiler / GHC · GitLab

Misfeature of Cmm optimiser: no way to extract a branch of expression into a separate statement

#5171 · opened May 06, 2011 by rtvd 8.0.1 3 Plow Trac import feature request runtime perf
- 5
updated Jul 07, 2019
Another SpecConstr infelicity

#4945 · opened Feb 03, 2011 by batterseapower 8.0.1 5 Pnormal Trac import bug runtime perf
- 14
updated Jul 07, 2019
LLVM compiles Updates.cmm badly

#4308 · opened Sep 14, 2010 by dterei 8.0.1 3 LLVM backend Plow Trac import bug runtime perf
- 16
updated Jul 07, 2019
Optimisations give bad core for foldl' (flip seq) ()

#4301 · opened Sep 10, 2010 by daniel.is.fischer 8.0.1 3 Plow Trac import bug runtime perf
- 8
updated Jul 07, 2019
Primitive constant unfolding

#4101 · opened May 28, 2010 by malosh 8.0.1 3 Plow Trac import bug runtime perf
- 17
updated Jul 07, 2019
Strict constructor fields inspected in loop

#4081 · opened May 19, 2010 by rl@cse.unsw.edu.au 8.0.1 3 Plow Trac import bug runtime perf
- 21
updated Jul 07, 2019
Improve inlining for local functions

#3781 · opened Dec 23, 2009 by Simon Peyton Jones 8.0.1 0 Plow Trac import bug runtime perf
- 9
updated Jul 07, 2019
Improve join point inlining

#3755 · opened Dec 15, 2009 by Simon Peyton Jones 8.0.1 3 Plow Trac import runtime perf task
- 7
updated Jul 07, 2019
Comparisons against minBound/maxBound not optimised for (Int|Word)(8|16|32)

#3744 · opened Dec 11, 2009 by rl@cse.unsw.edu.au 8.0.1 3 Plow Trac import bug feature request runtime perf
- 14
updated Jul 07, 2019
New codegen: allocate large objects using allocateLocal()

#3462 · opened Aug 25, 2009 by Simon Marlow 8.0.1 3 Plow RTS Trac import runtime perf task
- 6
updated Jul 07, 2019
GHC's GC default heap growth strategy is not as good as other runtimes

#3061 · opened Mar 03, 2009 by dons 8.0.1 0 Plow RTS Trac import bug runtime perf
- 12
updated Jul 07, 2019
MutableByteArray# is slower than Addr#

#2374 · opened Jun 18, 2008 by dolio 8.0.1 0 NCG backend Plow Trac import bug runtime perf
- 14
updated Jul 07, 2019
Needless reboxing of values when returning from a tight loop

#2289 · opened May 17, 2008 by dons 8.0.1 0 CPR analysis Plow Trac import bug runtime perf
- 38
updated May 18, 2020
Word type to Double or Float conversions are slower than Int conversions

#2269 · opened May 07, 2008 by dons 8.0.1 0 Plow Trac import feature request newcomer rules runtime perf
- 16
updated Jul 07, 2019