In general, to dream of performing means you have been dishonest, with others or yourself.
If it’s a pleasant dream, lying has worked in your favor, but it could have bad consequences. This is also a common dream of performers who are “praticing” a routine in their sleep. Also look under “Stage”, “Singing, “Dancing” and/or “Talent Show”.... My Dream Interpretation
If a person sees himself performing salaah in the ka’bah in the proper manner, observing complete ruku’ and sajdah and adopting inner serenity and outer calmness, then it means that he is rightly divided by Allah and steadfast upon the sunnah of Rasoolullah (sallallaahu-alayhi-wasallam). For, salaah is the main pillar of Islam(after Imaan) and a link between Allah and His servant.
But if the salaah is defective, lacking in Khushoo’ and Khudoo’ (i.e., Inner serenity and outer calmness and composure) it suggests that he has no regard for Islam and his contempt for it is equivalent to the mistakes he makes. He should make amends without further delay.... Islamic Dream Interpretation