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Assorted Rants Tagged ‘Latency’, page 2:

Packet Loss for an App-Level Developer. Part I. Router Failures, BGP Convergence Time, AQM, Traffic Shapers.

posted January 16, 2017 by "No Bugs" Hare

Quote:	“All the routers, switches (actually – pretty much each and every device which forms Internet infrastructure) – are allowed to drop each and every packet.”
Another Quote:	“TCP, when it observes a dropped packet, interprets it as an indication of congestion – and slows down.”
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posted March 21, 2016 by "No Bugs" Hare

Abstract:	The choice of TCP over UDP (or vice versa) might not always be obvious. In a sense, replacing TCP with UDP is trading off reliability for interactivity.
Quote:	“The most critical factor in selection of TCP over UDP or vice versa is usually related to acceptable delays”
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posted January 25, 2016 by "No Bugs" Hare

Quote:	“For fast-paced games, there is one big problem with the flow shown on this diagram, and the name of the problem is “latency” (a.k.a. ‘input lag’)”
Another Quote:	“No, better bandwidth doesn’t necessarily mean better latency”
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posted July 6, 2015 by "No Bugs" Hare

Quote:	“In addition, if TCP_NODELAY is set, it MIGHT help to mitigate consequences of exponential backoff algorithm in case of lost packets.”
Another Quote:	“All of us are seeing ‘hung’ HTTP connections on a regular basis – that is, when we’ve clicked a link, and the page loading is stuck forever.”
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posted June 29, 2015 by "No Bugs" Hare

Quote:	“In general, lag and jitter are not specific to UDP, and manifest themselves for absolutely any Internet connection.”
Another Quote:	“If you need a globally-reachable server with single-digit-ms lag for all the players, it is simply not possible”
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posted June 22, 2015 by "No Bugs" Hare

Quote:	““Why bother with UDP at all? The answer is simple: there is a price tag attached to the TCP goodies.”
Another Quote:	““Implementing your own reliable-delivery protocol over UDP is extremely complicated, time-consuming, and error-prone.”
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posted June 15, 2015 by "No Bugs" Hare

Quote:	“If your game is the only one working when all the competition is down, it improves user perception about your app a lot.”
Another Quote:	“Most importantly, however, this approach allows to keep your players happy – and this is one thing which really matters”
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