POST /comments with relationship or POST /articles/33/comments

There’s no need to carry this discussion in multiple threads. I responded to the thread you created, and we can continue there.

I’d be interested in seeing those results. Despite what they reinforce in college, performance related issues which are outside the bounds of algorithmic complexity are generally best addressed when they show signs of being a problem. I regularly have to fight the urge of premature optimization, so I understand where you are coming from.