We started with an LLVM-based JIT in Pyston v1. Our experience with the two jits is that it's very nice that DynASM is ~2 orders of magnitude faster, and also

We started with an LLVM-based JIT in Pyston v1. Our experience with the two jits is that it's very nice that DynASM is ~2 orders of magnitude faster, and also that we have not been able to extract enough high-level knowledge to make a powerful JIT like LLVM worth it. We do use LLVM elsewhere in our build process, and we hope to write some future blogposts about all of this.