How fast can you transfer data on localhost?
The speed of data transfer on localhost depends on several factors, including the hardware and software configuration of the computer, the amount of data being transferred, and the method used for the transfer.

In general, data transfer on localhost can be faster than over a network because the data does not need to be transmitted over a network connection and there is no network latency or bandwidth constraints. The speed can be limited by the performance of the computer's processor, memory, and storage, as well as the efficiency of the software being used for the transfer.

In practice, the data transfer speed on localhost can range from several megabytes per second to several gigabytes per second, depending on the specific setup and conditions.
Does localhost traffic reach the machine's network interface, or is it handled by the OS?