Is there any ideal time to complete Salah like 4 rakkat in 15 minutes or ? Or anything like that ?
There is no specified time for prayer. However, the prayer should take as much time is needed to be performed in a way that doesn't make the performer in a rush or haste. Meaning: one should take his time between each segment action. Generally speaking: dhuhur prayer should take 5 to 10 minutes on average.