Re: [Chicken-hackers] Benchmark for "values" - interesting results

[John Cowan]

Jörg F. Wittenberger scripsit:

> On May 22 2013, Peter Bex wrote:
> >We already knew the SRFI implementations shipped with CHICKEN are
> >extremely inefficient.  It's been a plan to rewrite some of them
> >using faster internal versions for a while.  Also, the design of
> >SRFI-1 and SRFI-13 is pretty stupid when considering efficiency,
> >because many procedures gratuitously accept multiple arguments
> >and when called differently the procedures may even do slightly
> >different things, which makes it hard to optimize for.
> 
> I'm not familiar with Chickens optimizer.  Could Chicken pass
> the ordinary first class value when used as variable reference
> and still overload the name with a syntactic binding?  This
> should make it rather easy to add some syntax atop of those SRFIs
> to dispatch to fixed-args-one-case versions for efficiency.

I've always thought that case-lambda should be built into the core,
so that simple tail recursions, like this:

(define foo (case-lambda
  ((bar baz) ...)
  ((baz) (foo #f baz))))

can be rewritten as a varargs function with appropriate internal jumps,
without the need to construct and then deconstruct a list.

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