A Gigabit Ethernet connection means 1Gbps minus some overhead, effective rate is around 117-120 MB/sec, so the 500 MB container takes at least 4 seconds to copy

A Gigabit Ethernet connection means 1Gbps minus some overhead, effective rate is around 117-120 MB/sec, so the 500 MB container takes at least 4 seconds to copy. 10 Gbps gets you to less than a second, but that works usually between servers, not from the regular laptops.