Yes, it's just a compile time thing. There's no runtime penalty Simon
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Sean Leather Sent: 01 August 2008 18:31 To: Simon Peyton-Jones Cc: Ian Lynagh; Simon Marlow; cvs-ghc@haskell.org Subject: Re: Orphans Hi, I'm fixing http://hackage.haskell.org/trac/ghc/ticket/2467 Since you bring up orphans, I have a more general question regarding them that came up recently. The design of a library I'm working on requires orphan modules. After reading the GHC user's guide, I believe that orphans are (only) a compile-time performance issue and that they do not affect run-time performance. Can someone confirm my understanding? Is there any other concern we should have with orphans? The library is not a large project, so I'm not concerned with build time. We're currently ignoring the issue with -fno-warn-orphans. Thanks, Sean
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