I’ll accept your word it was an unusually quick review. I honestly can’t remember.
On a more general point though, the reviews that are solely about is a player onside/ off side at the point of a specific freeze frame, do tend to be done pretty quickly. I think that has improved since the recent tolerance level was introduced.
The ones that tend to take the longest are those that involve multiple factors. For example those like the Salah one the other day where they have to consider both the offside and whether they’d been a deliberate play at the ball. Or those where there’s both an onside/ offside and also penalty/ no penalty to consider.