In visitor profile I never saw more than 100 visits. I know that some of my visitors have between 100-200 visits and even more, but visitor profile do not show them correctly. I propose if there are more than 100 visits and query is too resource consuming it should show "more than 100 visits" (preferably exact number of visits).
It would be really nice if this could be parameter in Settings, because sometimes it is overkill to spend to much resources just to return correct count of visits. Parameter should be named something "Limit count of visitor tom max $count visits". $count should be variable or at least constant.