That is another part I missed, the ASM implementation seemed to optimise the function while potentially deoptimising the whole program. For most code overflows

That is another part I missed, the ASM implementation seemed to optimise the function while potentially deoptimising the whole program. For most code overflows are rare, jumping to deal with the rare cases but otherwise just doing the normal is often best for whole program performance. But to be honest I am not current in assembly as I like managed languages to much.