I didn’t think this is worthy of a bug and I don’t have much real scientific evidence, but since upgrading to v2.3.0.beta10, I’ve noticed that threads are much slower to load.
I’ve noticed this on multiple forums hosted in different places (@v2.3.0.beta10 +28), even threads with only a couple of posts still take a second or two to fetch the posts.
This thread has 14k posts so it’s a dramatic example: