<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">The only informal paper I remember is Stuart Cheshire’s It’s the latency, stupid…<div class=""><a href="http://www.stuartcheshire.org/rants/Latency.html" class="">http://www.stuartcheshire.org/rants/Latency.html</a></div><div class=""><br class=""></div><div class="">Given it’s from the dialup days, but latency is still the same just a lot lower.</div><div class=""><br class=""></div><div class="">I would thing I would recommend now is checking out SRE docs as well for application latency it's not network related, but does affect performance.</div><div class=""><a href="https://landing.google.com/sre/sre-book/toc/" class="">https://landing.google.com/sre/sre-book/toc/</a></div><div class=""><br class=""></div><div class=""><div class="">
<div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; 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;">Sincerely,<br class=""><br class="">Eric Tykwinski<br class="">TrueNet, Inc.<br class="">P: 610-429-8300</div>
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<div><br class=""><blockquote type="cite" class=""><div class="">On Apr 8, 2020, at 6:36 PM, Jakob Heitz (jheitz) via NANOG <<a href="mailto:nanog@nanog.org" class="">nanog@nanog.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">My data point:<br class=""><br class="">I'm working from home. My computer is connected through company VPN, over wifi to Comcast.<br class="">Comcast speed test says 18mS.<br class="">I use VNC and Webex with voice and video through the computer.<br class="">VNC response time and voice delay is not noticeable.<br class=""><br class="">Regards,<br class="">Jakob.<br class=""><br class="">-----Original Message-----<br class="">Date: Tue, 7 Apr 2020 22:52:18 +0000<br class="">From: Adam Thompson <<a href="mailto:athompson@merlin.mb.ca" class="">athompson@merlin.mb.ca</a>><br class=""><br class="">I’m looking for a practical guide – i.e. specifically NOT an academic paper, thanks anyway – to predicting the effect of increased (or decreased) latency on my user’s applications.<br class=""><br class="">Specifically, I want to estimate how much improvement there will be in {bandwidth, application XYZ responsiveness, protocol ABC goodput, whatever} if I decrease the RTT between the user and the server by 10msec, or by 20msec, or by 40msec.<br class=""><br class="">My googling has come up with lots of research articles discussing theoretical frameworks for figuring this out, but nothing concrete in terms of a calculator or even a rule-of-thumb.<br class=""><br class="">Ultimately, this goes into MY calculator – we have the usual north-american duopoly on last-mile consumer internet here; I’m connected directly to only one of the two. There’s a cost $X to improve connectivity so I’m peered with both, how do I tell if it will be worthwhile?<br class=""><br class="">Anyone got anything at all that might help me?<br class=""><br class="">Thanks in advance,<br class="">-Adam<br class=""><br class="">Adam Thompson<br class="">Consultant, Infrastructure Services<br class="">[[MERLIN LOGO]]<<a href="https://www.merlin.mb.ca/" class="">https://www.merlin.mb.ca/</a>><br class="">100 - 135 Innovation Drive<br class="">Winnipeg, MB, R3T 6A8<br class="">(204) 977-6824 or 1-800-430-6404 (MB only)<br class=""><a href="mailto:athompson@merlin.mb.ca" class="">athompson@merlin.mb.ca</a><<a href="mailto:athompson@merlin.mb.ca" class="">mailto:athompson@merlin.mb.ca</a>><br class=""><a href="http://www.merlin.mb.ca" class="">www.merlin.mb.ca</a><<a href="http://www.merlin.mb.ca/" class="">http://www.merlin.mb.ca/</a>><br class=""><br class=""></div></div></blockquote></div><br class=""></div></body></html>