fix for Data.List.sortBy

[Siddhanathan Shanmugam]

On Tue, Mar 28, 2017 at 12:48 PM, David Feuer <david.feuer at gmail.com> wrote:

> There are a number of intermediate lists that are certainly non-empty, but
> their types don't reflect that. I wonder if using a non-empty list type
> unpacked into the list of lists might be helpful.
>

I just tried it. Seems to work fine, and the benchmark numbers are similar.

Doing this in base would introduce cyclic dependencies though.




>
> On Mar 28, 2017 3:39 PM, "Gregory Popovitch" <greg7mdp at gmail.com> wrote:
>
>> OK, here is the current proposed change - tests look good:
>>
>>
>> Any comments/opposition from the community?
>>
>> Thanks,
>>
>> greg
>>
>>
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