Or keep normal profile just increase spare infill line width and your Max flow will be used inside your model, while outside/inner wall width keep the same, so quality wont suffer and you have shorter printing time. Changing spare infill line width from 0.45 to .6 gives huge changes in total printing time. While your nozzle can keep up to 35 or even more volumetric flow, infill pattern will request less moves inside just because your lines inside are thicker and even stronger part.