I've been researching the same thing for my desktop PC while building my kernel on my own. I have decided to disable NUMA after much research. My CPU is a Core i7 3820 which has 8 processors with HT. This page helped my come to my decision.

https://bugs.archlinux.org/task/31187

In summary, NUMA is only worthwhile if you have more than 1 CPU socket (regardless of cores). There is a very small hit to processing power on 1 CPU Socket machines even with multiple cores, but it is hardly noticeable so most distributions leave it enabled as it will provide a huge benefit to servers and machines with more than 1 socket.

I've been researching the same thing for my desktop PC while building my kernel on my own. I have decided to disable NUMA after much research. My CPU is a Core i7 3820 which has 8 processors with HT. This page helped my come to my decision.

disable NUMA from config files

In summary, NUMA is only worthwhile if you have more than 1 CPU socket (regardless of cores). There is a very small hit to processing power on 1 CPU Socket machines even with multiple cores, but it is hardly noticeable so most distributions leave it enabled as it will provide a huge benefit to servers and machines with more than 1 socket.