Yeah, I never did it (as a current grad student) not because I didn’t think it was an important task. But rather thought that it's just something that everyone does/should do and doesn’t add anything to the CV.

Maybe I should add a line like that as well.

I've never actually seen people putting conference reviewing info on their CV. For more senior researchers, being on the committee or something sure, but never really seen just putting being a reviewer in. Also, unless someone gets "great reviewer" awards or something, just being a reviewer doesn't really say a lot, does it?

Not necessarily a function but the njit decorator from numba.