It seems that currently there is no Lisp that satisfies my needs:
1) windows platform
2) free (I want to produce a freeware application)
3) runs Maxima
4) has cffi
5) has testet support of a standard gui library (qt, gtk, wx, fltk)
6) fast
cmucl fails at 1
gcl fails at 4
sbcl fails at 3,5
clisp fails (at least) at 6
acl fails at 2
Is this analysis correct?
RO