<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><br><div><br><blockquote type="cite"><div>On Jan 3, 2023, at 08:24, Mike Hammett <nanog@ics-il.net> wrote:</div><br class="Apple-interchange-newline"><div><meta charset="UTF-8"><span style="caret-color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 13.333333px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;">I think this is why Netflix came out with<span class="Apple-converted-space"> </span></span><a href="http://fast.com/" style="font-family: arial, helvetica, sans-serif; font-size: 13.333333px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;">fast.com</a><span style="caret-color: rgb(0, 0, 0); font-family: arial, helvetica, sans-serif; font-size: 13.333333px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;">, but AFAIK, they're the only ones that have their own tool using their own infrastructure.</span><br class="Apple-interchange-newline"></div></blockquote></div><br><div>macOS have a built-in “networkQuality” command line tool (`man networkQuality` or https://support.apple.com/kb/HT212313 ). (iOS and iPadOS have a similar tool if a “WiFi Performance Diagnostics” profile has been installed).</div><div><br></div><div>See also <a href="https://datatracker.ietf.org/doc/draft-ietf-ippm-responsiveness/">https://datatracker.ietf.org/doc/draft-ietf-ippm-responsiveness/</a></div><div><br></div><div><div>$ networkQuality</div><div>==== SUMMARY ====</div><div>Uplink capacity: 1.029 Gbps</div><div>Downlink capacity: 2.132 Gbps</div><div>Uplink Responsiveness: High (7199 RPM)</div><div>Downlink Responsiveness: Medium (450 RPM)</div><div>Idle Latency: 12.042 milliseconds</div></div><div><br></div><div><br></div><div>Ask</div></body></html>