In many benchmarks, Racket is significantly faster than many other Scheme implementations, including Chicken: https://ecraven.github.io/r7rs-benchmarks/ This is because it is now based on Chez.
It is certainly not compact, though.
It is certainly not compact, though.
FWIW: I enjoy working with Gambit, especially since it can compile to C and standalone binaries and also scores even higher than Racket.