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| From: William D Clinger <will@xxxxxxxxxxx> | Date: Sun, 18 Jun 2006 13:47:19 -0400 | | arcin 'Qrczak' Kowalczyk wrote: | > These points seem to be contradictory: | ... | > Can we expect a portable and reasonably efficient implementation | > of this SRFI to be written as the reference implementation? | | Yes. I'm working on it. | | A relatively small subset of the fixnum and flonum procedures | will be identified as the basic primitives. If implementors | implement those primitives efficiently, they will be rewarded | with a reasonably efficient implementation of the full SRFI. | | The reference implementation won't make multiple values any | faster, but it should provide multiple implementations of the | procedures that would most naturally use them, so systems in | which multiple values are fast can benefit from using them | and systems in which multiple values are slow can eschew them. If the system eschews them, what are the bounds of the system; are libraries part of the system? Is it incumbent on platform-neutral libraries to have multiple-value and non-multiple-value alternates? What mechanism is there for library code to discover whether the implementation running it has fast multiple-values?