the prophet(s) teaching abu dharr how important meditation is states

"O abu dharr! Two rak'ats of conscious and heedful prayer accompanied by meditation is better than one night of worship with a heedless heart"

Taking into accout the importance and prominent role of meditation and reflection,the Noble prophet(s) states that two rak'ats of prayer performed in a CONSIOUS and HEEDFUL manner---not that they ought to be necessarily long---but along with thought have more reward and effect in the perfection of man than waking up at night and spending it all in prayer until morning WITHOUT presence of heart

Of course,if man recites his prayers very fast and with a lot of haste,he cannot perceive his duties and pray in the correct way;

as can be inferred from hadiths,prayer with haste which is devoid of reflection,thought and heed is like a crow with its beak in the ground;that is to say,this prayer is not profitable and because it occurs without attention and is performed in haste that man does not find the opportunity to perceive the presence of Allah,and so reflect and meditate upon the context and purports of prayer. What is being asserted is that two rakats of prayer with consciousness and attention are better than long repeated prayers without heed and presence of heart

"so woe to those praying ones,"
"who are careless of iheir prayers,"-surat maun:4-5

As has been frequently been said,man's spiritual journeying consists of both academic and spiritual journeying;man's spiritual ascendancy depends on his intellect and the increase of his perception. In other words, man sets foot on the course of ascendancy towards Allah accompanied by knowledge. His gaining proximity to Allah imply changing places;which is dependent on the increase of His intelligence and attentiveness,

The rise and growth of his conception of the majesty of Allah and His Attributes;the more his awareness increases the more He become Close to Allah in contrast man lags behind in perfection,growth and awareness of Allah to the extent of his ignorance

Prayer is a means of attaining perfection and is meant to make man feel more nearness to Allah,but if this prayer is devoid of attention and perception of the status of Allah,the person reciting the prayers is like a person busy performing exercise and stretches,because he has not derived any benefit from the context and purport of prayer

Note--that prayer devoid of attention and presence of heart is BETTER than sleeping and not praying,

But it is more profiting and proper that prayer is accompanied with presence of heart; in which case his movement become faster and he arrives at his destination faster,which is proximity(qurb) to Allah