Issues · Glasgow Haskell Compiler / GHC · GitLab

Low-hanging(?) optimization fruit

#18541 · opened Aug 05, 2020 by Richard Eisenberg compiler perf task
- 1
- 10
updated Aug 12, 2020
Improve perf in substitution

#18535 · opened Aug 04, 2020 by Simon Peyton Jones compiler perf task
- 2
updated Aug 11, 2020
NthCo (FunCo a b) doesn't optimise

#18528 · opened Aug 03, 2020 by Simon Peyton Jones compiler perf simplifier task
- 1
- 1
updated Aug 11, 2020
The flattener is very slow

#18502 · opened Jul 27, 2020 by Simon Peyton Jones compiler perf constraint solver
- 0
updated Aug 13, 2020
ghc 8.8.3 with llvm 9, instead of 8.6.5 with llvm 6 sometimes OOM on arm

#18475 · opened Jul 18, 2020 by Dimitri John Ledkov ARM LLVM backend Pnormal bug compiler crash compiler perf
- 1
updated Jul 22, 2020
Investigate inlining sweetspot for Generics with `-fdicts-strict`

#18450 · opened Jul 14, 2020 by Andreas Klebinger compiler perf runtime perf
- 5
updated Jul 16, 2020
Try -XMonoLocalBinds in GHC for compile-time performance improvements

#18430 · opened Jul 07, 2020 by Sebastian Graf compiler perf task
- 1
- 2
updated Jul 14, 2020
Suboptimal constraint solving

#18413 · opened Jul 02, 2020 by Simon Peyton Jones compiler perf constraint solver task typechecker
- 1
updated Jul 17, 2020
Follow-up from "WIP: Make UniqFM typed on it's key" 0 of 1 task completed

#18387 · opened Jun 24, 2020 by Andreas Klebinger 8.14.1 compiler perf task
- 2
updated Jul 05, 2020
Improve compiler performance

#18354 · opened Jun 18, 2020 by Simon Peyton Jones compiler perf task
- 0
updated Jul 31, 2020
Compiling tagsoup with optimizations loops infinitely on HEAD

#18304 · opened Jun 06, 2020 by Ryan Scott Phighest bug compiler perf
- 1
- 16
updated Jun 27, 2020
Simplifier uses gigabytes of memory with large transformer stacks

#18223 · opened May 23, 2020 by Jackson Garner Phigh bug compiler perf
- 1
updated May 24, 2020
Check eta-expansion in the compiler

#18202 · opened May 19, 2020 by Sylvain Henry Arity and eta expansion The state hack compiler perf
- 2
- 13
updated Aug 14, 2020
ghc 8.8.3 uses 25-30% more time and memory to derive instances with -XDerivingVia

#18077 · opened Apr 20, 2020 by chris.parks DerivingVia Pnormal bug compiler perf
- 5
updated Apr 26, 2020
Big types and memory consumption when profiling

#18031 · opened Apr 08, 2020 by Nicola Bonelli Pnormal bug compiler perf
- 3
updated Apr 09, 2020
coreView is huge!

#18026 · opened Apr 07, 2020 by Ben Gamari Phigh bug compiler perf
- 4
updated Apr 10, 2020
pandoc is quite slow to compile

#18010 · opened Apr 03, 2020 by Ben Gamari Pnormal bug compiler perf
- 2
- 7
updated Apr 14, 2020
Combine STG free variable traversals.

#17978 · opened Mar 29, 2020 by Andreas Klebinger 9.0.1 Pnormal code generation compiler perf newcomer
- 1
- 4
updated Apr 03, 2020
Optimise nullary type synonym comparisons and avoid allocating TYPE TyConApps

#17958 · opened Mar 24, 2020 by Ben Gamari compiler perf task
- 2
updated May 25, 2020
Post type-checking interface files

#17843 · opened Feb 17, 2020 by John Ericson compiler perf feature request
- 5
updated May 29, 2020

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