3 ms·

They mention that the polling increases latency. But by how much? Is windows affected by this? Because I've never noticed it have an impact on video calls.

• londons_explore 6y ago
  It mostly depends on the actual network hardware, drivers and the access point, not the OS. When a WiFi device does a 'scan' (which it needs to do to know if there might be a better AP to connect to, amongst other things), it has to retune the radio to another frequency. That means it can't listen on the original frequency, and packets get lost. Depending on the network design, they might be retransmitted from the access point (layer 2 retransmit, a few milliseconds), or by TCP after a timeout (1 network round trip, hundreds of milliseconds often). A third option is your laptop tells the AP that it is going into a power saving mode and won't be listening. Packets are then queued for it while it retunes and does a scan. Best would be to have multiple radios, one whose only job is scanning. Then there would be no latency impact at all.