Damien Mattei writes: > when comparing the (almost) same code running on Guile and Racket i find > big speed difference: Schemes differ a lot in speed of different tasks, but Racket is one of the fastest ones. Factor 2 difference sounds plausible. For a comparison, see the r7rs benchmarks: https://ecraven.github.io/r7rs-benchmarks/ That said, I have seen 10x speedups in Guile code when people went for optimizing it. > last version of code is here: > https://github.com/damien-mattei/library-FunctProg/blob/master/guile/logiki%2B.scm#L3092 Could you give the shell commands to setup and run your speed-test? Best wishes, Arne -- Unpolitisch sein heißt politisch sein, ohne es zu merken. draketo.de