Besides the potential typo noted by another comment, I'd also note that the benchmarks are on a WebAssembly compiler, which has already gone through the LLVM wringer and thus undergone many high-level optimizations, including those reliant on alias analysis (which Cranelift is quite conservative on, iirc). I'd also imagine that the translation from LLVM IR to WASM discards some useful information that the LLVM backend could otherwise have used to generate better assembly.

That's not to say Cranelift isn't a fantastic piece of tech, but I wouldn't take the "14%" or "24%" number at face value.