Yes and no. The interactive version appears to be because it displays results as it goes. However for pure command line, it will be fast but not comparable to ripgrep/grep/silver server or others.

I want it fast, but absolute performance is not a goal as its a trade off with any ranking algorithm. Not really the same sort of tool.

Anyway here is a search over my projects directory which is about 5.7 GB of content https://github.com/boyter/cs/blob/master/large-search.gif

Feel free to try it out if you are able to build from source. It certainly has some bugs in there over large codebases in the UI which I am aware of but does work generally.