Proposal: Make intersect(By) lazier and faster

[Thomas Schilling]

+1 for proposal

On 16 September 2010 17:20, Bas van Dijk <v.dijk.bas at gmail.com> wrote:

> Agreed, but my reason for proposing using 'filter' instead of using a
> list comprehension is that I find it more "denotational". However, I
> think that's a matter of taste.

Funny, I feel the opposite. ;)  Also, list comprehensions are usually
best if you want to increase the likely hood of fusion because the
desugaring is under GHC's control.