[Haskell-cafe] Please add a method for optimized concat to the Semigroup class

Yitzchak Gale gale at sefer.org
Tue May 3 13:12:33 CEST 2011

Hi Edward,

Thanks much for the very useful semigroups

When using it in practice, it would be very useful
to have an analogue to the mconcat method of
Monoid. It has the obvious default implementation,
but allows for an optimized implementation for
specific instances. That turns out to be something
that comes up all the time (at least for me) in
real life.


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