A user posted the following to the ghc-proposals repository. Both JB and RAE suggested ghc-devs as a more appropriate forum. Since I have no idea whether the user has even ever used a mailing list before I thought I would lower the activation energy by posting their message for them. https://github.com/ghc-proposals/ghc-proposals/issues/410
Hi,
Does the GHC release or development process include regression testing for performance?
Is this the place to discuss ideas for implementing such a thing and to eventually craft a proposal?
I believe the performance impact of changes to GHC needs to be verified/validated before release. I also believe this would be feasible if we tracked metrics on building a wide variety of real-world packages. Using real-world packages is one of the best ways to see the actual impact users will experience. It's also a great way to broaden the scope of tests, particularly with the combination of language pragmas and enabled features within the compiler.