@Test public void test_findDiscountPrices() { long time1 = Performance.getConsumedTime( () -> { List<String> discountPrices = Shop.getDiscountPricesSync(shops, "MaxBook 11"); assertEquals(shops.size(), discountPrices.size()); }); long time2 = Performance.getConsumedTime( () -> { List<String> discountPrices = Shop.getDiscountPricesAsync(shops, "MaxBook 11"); assertEquals(shops.size(), discountPrices.size()); }); System.out.println("getDiscountPrices Sync: " + time1); System.out.println("getDiscountPrices Async: " + time2); }