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

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 :

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 :

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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" wrote:

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Vassil Ognyanov Keremidchiev writes:

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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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