Looking for GHC compile-time performance tests

Thomas DuBuisson thomas.dubuisson at gmail.com
Sat May 7 19:56:33 UTC 2016

Similarly, please see https://ghc.haskell.org/trac/ghc/ticket/12032
for a regression when using many top-level cases in equational style.
I haven't looked at core, it's possible this issue is the same as
ticket 12028.

Also please note I am _not_ on the -dev list at present so that list
is not getting my responses to this thread.


On Fri, May 6, 2016 at 8:45 PM, Thomas DuBuisson
<thomas.dubuisson at gmail.com> wrote:
> On Thu, May 5, 2016 at 5:52 AM, Ben Gamari <ben at well-typed.com> 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.

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