#14035: Weird performance results. -------------------------------------+------------------------------------- Reporter: danilo2 | Owner: (none) Type: bug | Status: new Priority: high | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by danilo2): I've just shortened the example code and made the performance related questions simpler. I think it would be easier now debug what is going on under the hood. I would be very thankful for any information regarding this issue. We've been talking with many people - both in the company I'm working in as well as on IRC and we do not see any reason why this code behaves in this way and why it is so sensitive to the changes. We started to be worried a lot about how we can use Haskell for high-performance parts at all, if it is not obvious if a very simple change do not affect performance a lot. This situation makes the source code both very fragile to any changes and unmaintainable as a result. I'm writing this because I'm deeply worried about where these problems originate from and I would really like to solve them / know why they appear. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14035#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler