Both, but 'constant' here needs some qualification. Generally, it is 'constant' w.r.t. the witness you are proving you know, and something like logarithmic w.r

Both, but 'constant' here needs some qualification. Generally, it is 'constant' w.r.t. the witness you are proving you know, and something like logarithmic w.r.t. the statement about that witness you are proving.