[Haskell-cafe] ANN: `dump-core` a prettier GHC core viewer

Simon Jakobi simon.jakobi at googlemail.com
Fri Jan 13 05:41:37 UTC 2017

Wow, this looks great!

Do you think you could write a very short tutorial on how to use this
plugin in a stack project? A good example project might be Chris
Done's "xeno" which raised a lot of interest in generating fast Core:

Regarding the example output at
Is it intended that the variables in "$wsetStackSize" are (nearly) all
named "ww"? I think it would be more readable if I didn't have to
hover the cursor over a variable to tell which is which.

Lastly, could you please include the README in the extra-source-files,
so it's rendered on Hackage?


2017-01-12 19:36 GMT+01:00 Iavor Diatchki <iavor.diatchki at gmail.com>:
> Hello,
> Over the holidays I wrote a small GHC plugin to help me do some low-level
> optimizations of Haskell code.  I thought it might be of use to other people
> too, so please try it out!
> When enabled, the plugin will save the Core generated by GHC in JSON format,
> and also render it in HTML for human inspection.
> The plugin is available on Hackage:
> http://hackage.haskell.org/package/dump-core
> The instructions on how to use it are in the README file.
> You may also read about it at the github page:
> http://hackage.haskell.org/package/dump-core
> There are many things that could probably be improved, just let me know.
> Also, if you are good at design, I could use some help making things look
> prettier :)
> Happy hacking,
> -Iavor
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