Neither is Java. On carefully-written programs on some domains with full optimization, both Chez and Gambit have been observed to produce object programs that

Neither is Java. On carefully-written programs on some domains with full optimization, both Chez and Gambit have been observed to produce object programs that run at speeds comparable to those of their C equivalents. This isn't new. I think it was Guy Steele who observed circa 1970 that some Maclisp programs ran faster than Fortran equivalents.