[Haskell-beginners] Continuations

Jay Sulzberger jays at panix.com
Thu Jan 1 07:15:37 UTC 2015

On Wed, 31 Dec 2014, Cary Cherng <ccherng at gmail.com> wrote:

> I read (http://en.wikibooks.org/wiki/Haskell/Continuation_passing_style)
> that in some circumstances, CPS can be used to improve performance by
> eliminating certain construction-pattern matching sequences (i.e. a
> function returns a complex structure which the caller will at some
> point deconstruct). And that attoparsec is an example of this.
> I don't see exactly how CPS gives rise to concrete examples of
> performance gains. Moreover how does this arise in parsing for example
> with attoparsec as mentioned.
> I also encountered various web frameworks such as mflow that are based
> on continuations. How a typical http restful system is made into
> something based around continuations is not something that is obvious
> to me. And what is gained from that?

I just found this delightful article by John C. Reynolds:

The Discoveries of Continuations



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