Chez Scheme outperforms Gambit in the benchmarks cited in a commment above. Chez Scheme has a few interesting features that most compilers do not have, for any

Chez Scheme outperforms Gambit in the benchmarks cited in a commment above. Chez Scheme has a few interesting features that most compilers do not have, for any language: "A source file can also be precompiled into a stored binary form and automatically recompiled when its dependencies change. Whether compiling on the fly or precompiling, the compiler produces optimized machine code, with some optimization across separately compiled library boundaries. The compiler can also be directed to perform whole-program compilation, which does full cross-library optimization and also reduces a program and the libraries upon which it depends to a single binary."