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If we add a new closure type for `ByteArray#`, could it be used in runtime also?

I'm not sure I follow the suggestion here. What do you mean by "used in

#5218: Add unpackCStringLen# to create Strings from string literals -------------------------------------+------------------------------------- Reporter: tibbe | Owner: thoughtpolice Type: feature request | Status: patch Priority: normal | Milestone: Component: Compiler | Version: 7.0.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: #5877 #10064 | Differential Rev(s): Phab:D2443 Wiki Page: | -------------------------------------+------------------------------------- Comment (by winter): Replying to [comment:66 bgamari]: the runtime"? I mean can we change 'ByteArray#' 's representation into just length and content (removing the header)? I think that's not possible due to GC expect to see an uniform heap object representation, but i'm not sure there's no other way to make it work. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/5218#comment:67 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler