Mm3/s flow display

People often talk about printing speed but for beginners like me, I falsely thought that when I was putting 150mm/s in my slicer (Cura) my printer was sometime achieving that speed, ignoring acceleration etc... That's why I was wondering if it would be possible to make and display during the print the amount of molten plastic extruded in terms of mm3/s ? That way I think it would be easier to compare speeds between prints ?