This site is a static rendering of the Trac instance that was used by R7RS-WG1 for its work on R7RS-small (PDF), which was ratified in 2013. For more information, see Home. For a version of this page that may be more recent, see ImplementationContrasts in WG2's repo for R7RS-large.


2013-06-08 20:55:36

Implementation Contrasts

This is an index to pages that describe various detailed differences between Scheme implementations.

As of 2013-06-08, the list of Scheme implementations tested is:

Racket, Gauche, MIT, Gambit, plain Chicken, Chicken with the numbers egg, Bigloo, Scheme48, scsh, Guile, Kawa, SISC, Chibi, SCM, Chez, Vicare, Larceny, Ypsilon, Mosh, IronScheme, NexJ, STklos, KSi, SigScheme, Shoe, TinyScheme, Scheme 9, Dream (link dead), RScheme, S7, BDC, XLisp, Rep, Schemik, Elk, UMB, Oaklisp, Llava, SXM, Sizzle, FemtoLisp, Dfsch, Inlab, Owl Lisp.

My test system runs 32-bit Linux. All Schemes are installed from source, usually the latest release but in some cases the head of source control. However, not all versions are up to date, and the versions tested have changed over the past few years, so some of the claims in the pages below are surely obsolete. Implementers and users are urged to [ notify me] when they see something incorrect.

As of 2013-01-31, I was no longer able to build VX or Spark, so they are excluded from the suite from now on. For these and many other Schemes see the fairly complete list of Scheme implementations.

S7 was formerly, but incorrectly, known in these pages as "Scheme 7", and some references to this name survive. It's really named after the motorcycle.

Not all these pages have information on all these Schemes.

More implementation contrasts.