Re: Looking for GHC compile-time performance tests

On Thu, May 5, 2016 at 5:52 AM, Ben Gamari wrote:

So, if you would like to see your program's compilation time improve in GHC 8.2, put some time into reducing it to something minimal, submit it to us via a Trac ticket, and let us know in this thread.

Please see https://ghc.haskell.org/trac/ghc/ticket/12028 for an example with no dependencies beyond commons (ex. bytestring). There is a 6x performance regression or 4x if you're willing to delete UNPACK pragmas.