Netperf is used for testing network performance. The chart below shows the results forTCP stream performance.
What is apparent here is that the performance differences in the 100Mbps setup are negligible. From googling around, it seems to be more challenging to achieve similar results with 1Gbps and 10Gbps networks so the results can be different there, but I don’t have the network to test this.
Up next is a request/response test measuring how many requests/responses can be handled per second.
Again the results show that on my 100Mbps network there is practically no difference between the virtio network driver and an emulated RTL8139 driver.