# Scheme implementation performance I found the following quote from [http://c2.com/cgi/wiki?SchemeImplementations](http://c2.com/cgi/wiki?SchemeImplementations) helpful: >performance: Depends on what you're doing, but in general, -C compilers >(Stalin, Bigloo, Gambit, Chicken) come at the top, with Stalin somewhat >faster than the others; some compilers (mzc) are on par with fastest >interpreters. Interpreters fall in three classes, fast (Racket, Gauche, >RScheme, STklos), intermediate (Scheme48, scsh, SCM, MIT Scheme, Guile 2.0) >and rather slow (guile1.6). guile1.4 is yet slower. See also: - (Added 2017-08-22) Recent [results](https://ecraven.github.io/r7rs-benchmarks/) from a benchmark for R7RS implementations - [an opinionated guide to scheme implementations](http://wingolog.org/archives/2013/01/07/an-opinionated-guide-to-scheme-implementations) by Andy Wingo - [Scheme Unicode support](http://trac.sacrideo.us/wg/wiki/UnicodeSupport) comparison ## Page metadata URL: Published 2014-10-13, updated 2021-08-21. Tags: - comparison - old blog - performance - programming - Scheme Index: [Old blog](/old-blog).