Until shown otherwise, I am partial to the idea that this is just a difference between PG on Ubuntu vs PG on CentOS. It's possible docker is simply a red herri

Until shown otherwise, I am partial to the idea that this is just a difference between PG on Ubuntu vs PG on CentOS. It's possible docker is simply a red herring, and that there are too many confounding variables for any of these benchmarks to be meaningful. I would be interested to see more rigorous benchmarks of virtualized environments though.