Refactor benchmark app to fetch in chunks of full viewport tiles
Refactor benchmark app to fetch in chunks of full viewport tiles

HydroLogic/Windshaft,manueltimita/Windshaft,CartoDB/Windshaft,HydroLogic/Windshaft,wsw0108/Windshaft,CartoDB/Windshaft,manueltimita/Windshaft,wsw0108/Windshaft,CartoDB/Windshaft,HydroLogic/Windshaft,manueltimita/Windshaft,wsw0108/Windshaft