the early versions of L (circa ... 2011/2012) couldn't really deliver any substantial performance improvement over what is out there (BQN/ngn/Kona). The memory bandwidth was the limit - I simply couldn't keep the cores active. ~2018/2019 I started from scratch with arrays (vectors) using compression by default. That was a massive unlock - and I could not keep most of the CPU doing actual compute! Then it was years of working on compression native operations - some of which were obvious[3] like sum/reductions ... others not so much!