[davexunit]

Guile has come a long way in the past decade or so! I think your info is quite out of date. Guile's compiler performs a number of state of the art optimizations. It compiles to bytecode so native code compilers like Chez win the race, naturally. The JIT is pretty good, though! Native compilation is on the roadmap for Guile, but maybe somewhat surprisingly we're getting AOT compilation to WebAssembly first. https://spritely.institute/hoot/

[armitron]

It's still much much slower than SBCL which is not surprising given the time & effort that went into the latter. User-guided optimizations (type declarations, stack allocation, intrinsics, machine code generation) in SBCL are also more flexible and better integrated.

[davexunit]

Yup, SBCL is quite amazing!