I like the idea and would like to learn more, but it looks like "migrated stuff without testing ahead of time and it turned out faster for some reason". Was it the memory allocations? Was it the disk latency? The hypervisor? Could it be replicated by other means? It was a fun read, but the reasoning/understanding was missing. I hope people investigate deeper before making changes like that.

If you look for benchmarks comparing databases on Linux/BSDs you'll find lots of nuance in practice and results going both ways depending on configuration and what's being tested.