Today I learned about a precious little macOS command line tool,
The networkQuality tool is a built-in tool released in macOS Monterey that can help diagnose network issues and measure network performance.
==== SUMMARY ==== Uplink capacity: 44.448 Mbps (Accuracy: High) Downlink capacity: 162.135 Mbps (Accuracy: High) Responsiveness: Low (73 RPM) (Accuracy: High) Idle Latency: 50.125 milliseconds (Accuracy: High) Interface: en0 Uplink bytes transferred: 69.921 MB Downlink bytes transferred: 278.340 MB Uplink Flow count: 16 Downlink Flow count: 12 Start: 13/05/2023, 15:04:13 End: 13/05/2023, 15:04:27 OS Version: Version 13.3.1 (a) (Build 22E772610a)
It supports Apple’s Private Relay, offers some configuration options and allows setting up your own server. More info here.