GHC 8.4.1-rc1 is slower on a ray-tracer project

[Vassil Ognyanov Keremidchiev]

The project could be stripped off yesod package which bring a lot
dependencies with it. In cgraytrace-exe I don't use Yesod at all.

2018-02-28 19:22 GMT+02:00 Vassil Ognyanov Keremidchiev <varosi at gmail.com>:

> Those numbers are averaged from 5-10 runs. So there is some slow down for
> some reason. It's not great and it's just 3%. But I hoped that 8.4 has more
> optimizations and will lead to better performance and not worse.
>
> 2018-02-28 17:47 GMT+02:00 David Feuer <david.feuer at gmail.com>:
>
>> I don't see how 62 seconds rather than 60 is anything close to going off
>> the rails. Did I read something wrong? This sounds more like a minor wibble.
>>
>> On Feb 28, 2018 10:32 AM, "Ben Gamari" <ben at well-typed.com> wrote:
>>
>>> Vassil Ognyanov Keremidchiev <varosi at gmail.com> writes:
>>>
>>> > Hello!
>>> >
>>> > I have a small ray-tracer project: https://bitbucket.org/varosi/c
>>> graytrace
>>> > From time to time I'm testing it with different GHC versions including
>>> ARM.
>>> >
>>> Thanks for doing these tests! I have opened #14870 to make sure we don't
>>> lose track of this. It would be interesting to bisect this to see where
>>> we went off the rails.
>>>
>>> This is a very interesting example which the Cabal file says is in the
>>> public domain. In principle it would be a nice case to include in nofib,
>>> although I suspect it has few too many dependencies.
>>>
>>> Cheers,
>>>
>>> - Ben
>>>
>>>
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>>>
>
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