#9400: poor performance when compiling modules with many Text literals at -O1 -------------------------------------+------------------------------------- Reporter: rwbarton | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.8.3 Resolution: invalid | Keywords: Operating System: | Architecture: Unknown/Multiple Unknown/Multiple | Difficulty: Unknown Type of failure: Compile- | Blocked By: time performance bug | Related Tickets: #9370 Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by simonpj): Another possibility might be to remove the special behaviour of desugaring strings from GHC. Why is it there? I think it's in case you do {{{ case "x" of 'x' : ys -> blah }}} or something like that. But perhaps a better plan would be to make `unpackCString# "foo"` respond to `exprIsConApp_maybe` with "yes, I'm a cons; my head is `'f'` and my tail is `unpackCString# "oo"`. So before making `Text` more complicated, maybe we should explore making GHC less complicated! Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9400#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler