Hey Olivier!
I've heard that guile is generally faster than python, but there are some other schemes that are faster, notably chez scheme. I will also say that Andy Wingo (one of the guile maintainers) is working on making guile code "within" an order of magnitude of the speed of C code. I would say to try to build your program in guile and post back here. Good luck! -- Joshua Branson Sent from Emacs and Gnus