some optimizations
some optimizations


KDr2/femtolisp,KDr2/femtolisp,dcurrie/femtolisp,KDr2/femtolisp,MikeBeller/femtolisp,MikeBeller/femtolisp,dcurrie/femtolisp,MikeBeller/femtolisp,MikeBeller/femtolisp,dcurrie/femtolisp