[dokyun]

News flash, but Lisp compilers have gotten better since the 80's. In general, normal, unoptimized Lisp is probably on-par with Java, while optimized Lisp with a good compiler can get on par with C++. SBCL is a very good compiler, and GC technology has come a long way.

[tmtvl]

SBCL is fantastic, but the resources being poured in GCC and LLVM combined with CPU manufacturers including architectural features to help C and related procedural languages work better make it a massive uphill battle. I suppose that with proper use of things like sb-simd and arena allocation you can get in the ballpark of C, but with some tweaking C, C++, and Rust can get insanely fast (of course Fortran's better, but nothing compares to it, so let's leave that aside for now).