Hello Aditya, There is a 'ghc-devs@haskell.org' mailing list that might be better for this question. I'm sure they'd be interested if you gave them a concrete test case for this. On Thu, May 26, 2016 at 10:37 AM, aditya siram wrote:

Did I post this to the wrong list?

On Tue, May 24, 2016 at 7:36 AM, aditya siram wrote:

...

[x-post from Reddit reply]

Thanks so much for all the hard work!

Unfortunately I have a compile time performance regression to report on my FLTKHS https://github.com/deech/fltkhs library. I also don't have a minimal example. There is a demo that took about 15 seconds compile and link in 7.10.3, but with no changes now takes over a minute in 8.0.1. I've reproduced this across machines and operating systems.

Since there was interest expressed in using this example as a benchmark if any GHC devs are still willing to help, I'm willing to walk them through getting the library set up etc. It's not a long process. The tip of my Github branch has been updated to build with GHC 8.0.1. I made myself a Trac account but apparently I don't have Ticket privileges so it won't let me create one. My username is 'deech'.

Thanks! -deech

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