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A comment on ARMv7 vs. x86-64: Pathfinding benchmark of C++, D, Go, Nim, Ocaml, and more. Parent comment

Re:ARMv7 vs. x86-64: Pathfinding benchmark of C++, D, Go, Ni... by eschew on Saturday December 20, 2014 @11:04AM (#8776927)
GHC, at least, uses the same implementation for IORef and STRef: http://hackage.haskell.org/package/base-4.3.1.0/docs/src/GHC...

Poking through GHC's runtime source, I see a writer barrier but no locking -- did I miss something?

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Re:ARMv7 vs. x86-64: Pathfinding benchmark of C++, D, Go, Ni... by IsTom on Saturday December 20, 2014 @02:09PM (#8777563)
Looking deeper you're right, it seems to use atomic CAS operations. Still mutable data is bad for GC and optimization pass (can't share expressions etc.)
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