Enable -fworker-wrapper-cbv on ghc-9.4

This flag allows for some significant perf improvements and the downsides don't apply to containers. In particular this flag can cause rules to not fire *if* the relevant functions don't have NOINLINE pragmas. However the relevant functions in containers seem to have such a pragma so there should be no downside.
haskell · May 23, 2024 · 57bddd3 · 57bddd3
1 parent c651094
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diff --git a/containers-tests/containers-tests.cabal b/containers-tests/containers-tests.cabal
@@ -76,9 +76,10 @@ library
   hs-source-dirs:   src, tests
 
   ghc-options:      -O2 -Wall
+  if impl(ghc >= 9.4)
+    ghc-options:    -fworker-wrapper-cbv
   if impl(ghc >= 8.6)
     ghc-options:    -fproc-alignment=64
-
   other-extensions:
     BangPatterns
     CPP

diff --git a/containers/containers.cabal b/containers/containers.cabal
@@ -39,6 +39,8 @@ Library
     build-depends: base >= 4.10 && < 5, array >= 0.4.0.0, deepseq >= 1.2 && < 1.6, template-haskell
     hs-source-dirs: src
     ghc-options: -O2 -Wall -fwarn-incomplete-uni-patterns -fwarn-incomplete-record-updates
+    if impl(ghc >= 9.4)
+        ghc-options:    -fworker-wrapper-cbv
 
     other-extensions: CPP, BangPatterns