#13344: Core string literal patch regresses compiler performance considerably -------------------------------------+------------------------------------- Reporter: bgamari | Owner: bgamari Type: bug | Status: new Priority: high | Milestone: 8.2.1 Component: Compiler | Version: 8.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): Reid and I had a rather lengthy discussion about this problem. The take- away message is that while there are a variety of things that we could do to avoid moving string literals up to the top-level (and consequently avoid the costs associated with interface file names, as seen in comment:10), it is unfortunately rather tricky to do in a way that doesn't either come at significant implementation cost or risk regressing #12585. Consequently, we came up with a few ideas for instead reducing the cost of the now-larger interface files. Happily, this effort may also have helpful effects beyond string literals. The gist is that we want make interface file deserialisation more lazy. Reid is working on a patch. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13344#comment:15 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler