Depends... And a story from Ali(R) era
:salam2:
From what i have seen, say 2-5 minutes for one rakaath in farz salaat. (usually Obligatory Farz prayer, is prolonged. Sunnat Salaat is quicker 2-minutes per rakaath ).
Salaat should not be done in haste, Salaat has clearly defined stages, moments of absolute stillness connected by graceful movements, and most are accompanied with zikr, quran recitation. Every action should be completed, every word clearly uttered.
The point here is- The intent, the sincerity, the piety.... If you feel like prolonging it for 20 minutes go on do it, thats better, but you simply cannot be this fast -->>
. Usually everyone reports after a sincere Salaah, the body and mind feels much much better. The spirit soars!
Here is a incident when Ali Raliyallahu anha was caliph [ I heard this in a recent, sermon in mosque. ] To seems to capture the message very well!
So a youth comes to mosque, very quickly offers his Salaah. Ali (R) is known to correct (follows Prophets practise) when some one does not get it right,
Infact every human has the right to correct another, and every human has the right to be corrected (when motto, and the action shows good intent of getting better), I feel. . So Ali (R) calls upon the youth and asks him to redo the prayer. The youth offers same Salaah again gracefully, as suggested [valid to redo a salaah, under some conditions]. once he was done, Ali(R) asks the youth, which salaah was better , the former in haste or the latter?. So the youth replies to the caliph, Oh Ali(R), the first time was better. Ali(R) replies explain. (Make a note of the youths response.) Youth replies the first time was better because I offered it obediently to my Almighty. The second time it was out of fear of disobeying the caliph!!