Game runs significantly slower after 1.13

After the new 1.13 update, I have easily noticed that my game runs extremely slow since before the update. Before 1.13, I was able to run max graphics settings with 25 chunk render distance and still sometimes achieve over 1000FPS with V-Sync off. Now I can sometimes manage to get 60FPS with all Graphics settings set low, and render distance to 15 chunks. There's no way that the new animated kelp and other new additions are the sole reason for how badly my game runs. Please help as I'd love to be able to play normally again.