I'm finding it instantaneous here on a large dirty codebase. In what way is it slow for you?

Diff a large JSON file - I think it has to do with how large a single structure since I notice it most with static test fixtures.

Interesting, thanks, I'll keep an eye out for that. I rarely need to diff particularly large files.

Yeah, it’s the kind of thing you notice when you enable it as the default git diff helper and it’s great almost all of the time until you hit that one weird repo which has gigantic data files.