Tino Calancha writes: > The numbers above are Oleh's numbers from 2015. Yes, but AFAIR `seq-uniq' hasn't changed since then. > If i run similar benchmarks now i don't get such impressive > difference between cl-lib/seq: Indeed, I will run some benchmarks as well. In your benchmarks, cl-lib is still much faster than seq-uniq, even if it's not as impressive as Oleh's benchmark. Cheers, Nico