Game optimization is likely not going to happen till closer to the end of Early Access when the majority of major new content is added, I know that's frustrating for us players but that's a more efficient way to code games. If you try and do optimization with every stage, it will take way longer to finish overall and I know we're all eager for more content as it is Not the news I know y'all were hoping for I know

In the meantime, the tweaks here - https://www.reddit.com/r/valheim/comments/lizxq9/valheim_fps_fix_benchmark_picture_guide_gained_an/ - brought myself & all the folks on my server from single digit FPS in my village to 60 - 90 there, even with our 30 or so tame wolves >.>

Hope they help you out too!