If I don't run anything, it prints at the printer's "max" speed. I'd imagine if the data is bottlenecking due to the parallel port, then you'd see an improvement going with the USB cable. I also have ...

USB is supposed to be a consistent connection. But as the connector and underlying interfaces have evolved over the decades, it's more confusing than ever to know what a given USB port or cable is ...

Don't let the wrong port hold your peripherals back ...

Choosing a usb c cable therefore requires more than checking whether the plug fits. Power delivery, data-transfer speed, ...