[Haskell-cafe] missing optimization for (++)

Ben Franksen ben.franksen at online.de
Sun Mar 4 22:32:11 UTC 2018

Am 04.03.2018 um 22:40 schrieb Josef Svenningsson:
> The rule "foldr/id" will replace 'foldr (:) [] xs' with 'xs'.

Ah, thanks a lot. That was the missing piece. And good to know, too,
this means I can avoid a number of case distinctions I thought I needed
for optimum performance.


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