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Re: continuation efficiency
From: |
Thomas Bushnell, BSG |
Subject: |
Re: continuation efficiency |
Date: |
08 Jul 2001 12:33:03 -0700 |
User-agent: |
Gnus/5.0808 (Gnus v5.8.8) Emacs/20.7 |
Martin Grabmueller <address@hidden> writes:
> Yes, but aren't we talking about the implementation in Guile here?
> IIRC, you started this thread, asking about the performance of call/cc
> in Guile, and Marius posted an example of call/ec, based on
> catch/throw, _not_ based on call/cc. It was this implementation I was
> talking about, which uses catch/throw---these are primitives, and
> they are faster than call/cc *in Guile*.
I was misled by Marius's sample implementation in his article:
(define (call-with-escape-continuation proc)
(let* ((valid #t)
(source-handlers escape-handlers)
(val (call-with-current-continuation
(lambda (k)
(proc (lambda (v)
(set! source-handlers escape-handlers)
(k v)))))))
(if (not valid)
(error "escape continuation called from invalid context"))
(set! valid #f)
(do ((handlers source-handlers (cdr handlers)))
((eq? handlers escape-handlers))
(run-handler (car handlers)))
val))
and also my (incorrect) assumption that Guile implements catch in the
normal Schemey way.
- continuation efficiency, Thomas Bushnell, BSG, 2001/07/05
- Re: continuation efficiency, Martin Grabmueller, 2001/07/06
- Re: continuation efficiency, Marius Vollmer, 2001/07/06
- Re: continuation efficiency, Thomas Bushnell, BSG, 2001/07/06
- Re: continuation efficiency, Martin Grabmueller, 2001/07/07
- Re: continuation efficiency, Thomas Bushnell, BSG, 2001/07/07
- Re: continuation efficiency, Neil Jerram, 2001/07/08
- Re: continuation efficiency, Klaus Schilling, 2001/07/08
- Re: continuation efficiency, Thomas Bushnell, BSG, 2001/07/08
- Re: continuation efficiency, Martin Grabmueller, 2001/07/08
- Re: continuation efficiency,
Thomas Bushnell, BSG <=
- Re: continuation efficiency, Marius Vollmer, 2001/07/07
- Re: continuation efficiency, Thomas Bushnell, BSG, 2001/07/07
- Re: continuation efficiency, Marius Vollmer, 2001/07/07
- Re: continuation efficiency, Thomas Bushnell, BSG, 2001/07/08
- Re: continuation efficiency, Marius Vollmer, 2001/07/08
- Re: continuation efficiency, Klaus Schilling, 2001/07/09
Re: continuation efficiency, Thomas Bushnell, BSG, 2001/07/06