For computations using a lot of float arithmetic it removes boxing and unboxing. Say: (fl+ (fl* f1 f2) (fl* fl3 fl4)). This has to unbox fl1 fl2 fl3 and fl4, bu

For computations using a lot of float arithmetic it removes boxing and unboxing. Say: (fl+ (fl* f1 f2) (fl* fl3 fl4)). This has to unbox fl1 fl2 fl3 and fl4, but racket 7.7 immediately boxes the result of fl* only to unbox it again for fl+. This new racket does not.