Well from the Augus fight and Vlitra's beams are cacled to be relativistic and around lightspeed. This is 6-arms Asura.
His giant form is larger than Earth, so casual movements are already approaching lightspeed. In this form he's incredible fast compared to his size and was reacting to Chakravartin's FTL beams.
He destroyed Charkra's massive form which was Star sized, or something, will check at a later point.