The answer: by the dual dumbbell black hole capacity to create and focus gas into the middle, pressure cooker alike to form "Cannonball galaxies" (A) see below.
Galaxy’s rapid growth spurt may have spawned 3000 suns per year.
Quotation: "How do they get enough fuel to form stars so rapidly? " because all early galaxies feel the singular extra influence of the dual GABHs Galaxy Anchor Black Holes, splitted from the big bang BH.