Graphtage: A semantic diff utility for JSON, HTML, YAML, CSV, etc
It's cool, but does seem quite slow. I'm diffing two 45kB CSVs on a fast computer and after 10 minutes I'm still at:  Diffing:   0% ... 0/93195 [00:00<?, ?it/s]
  Tightening Fringe Diagonal 48 of 792: ...