it runs on your own machine, so naturally it's very hardware dependant.
but for reference i'm on a 3070 on my PC with a pretty old CPU, and each video took about the same video's length, maybe slightly faster, so about 10 mins for the first video, 2~ mins for the second one, etc.
just fast enough that i could drop any video (at least of similar resolution) into it and watch it as it decensors in real time, since the app lets you do that too.
way faster than i expected on my pretty old rig.
just remember, this tool is made basically just for JAV decensoring, which is almost exclusively the squared pixel/mosaic, so anything other than that will probably not work. I tried it on some blurred censoring and some weird hexagon pixelation censoring and none of those worked so yeah.
if you link me a video i can give it a try.