A proposal to scrap 45-minute halves is to be looked at by football's lawmakers to deter time-wasting.
Instead, there could be two periods of 30 minutes with the clock stopped whenever the ball goes out of play.
Lawmaking body the International Football Association Board (Ifab) says matches only see about 60 minutes of "effective playing time" out of 90.
The idea is one of several put forward in a new strategy document designed to address football's "negativities".
Another proposal would see players not being allowed to follow up and score if a penalty is saved - if the spot-kick "is not successful", play would stop and a goal-kick awarded.
Other ideas include a stadium clock linked to a referee's watch and a new rule allowing players to effectively pass to themselves or dribble the ball when taking a free-kick.