Hi,
Sure, that is possible as well. So, instad of selecting these taxonomy terms to be returned as results, you should instead select them in the index table options panel:
– Step 1, deselect them under the search settings: https://i.imgur.com/vBs9sa2.png
– Step 2, select them under the index table options: https://i.imgur.com/9Ry4PHN.png
For better performance, I recommend checking these tips from the documentation.
Ultimately the search performance corresponds with the server response time, as well as the number and quality of the plugins installed etc.. Those tips may give you the best possible response time with your configuration.