I had the same issues with LSP and I switched to eglot and it's much less sluggi...

Barrin92 on March 13, 2023 | parent | context | favorite | on: Emacs is not just an editor (2015)

I had the same issues with LSP and I switched to eglot and it's much less sluggish for me. I don't know why that is or if it's a general solution but worth giving a shot as eglot is built in I think in the newer versions.