From: Michael Richardson <mcr@sandelman.ca>
To: Jonathan Morton <chromatix99@gmail.com>,
Kenneth Porter <shiva@sewingwitch.com>,
bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] DSLReports Speed Test doesn't like Remote Desktop
Date: Sat, 28 Aug 2021 15:36:25 -0400 [thread overview]
Message-ID: <4088.1630179385@localhost> (raw)
In-Reply-To: <133F6C06-4354-4E84-8D7A-AED43E00126D@gmail.com>
RDP (specifically with Windows as the desktop) is integrated into the display
pipeline such that it effectively never loses frames. The results of an
(e.g.) Excel redraw over a slow link can be spectactically stupid with every
cell being drawn each time it is "re"-computed. The result is that the
application itself is blocked when the RDP frames are being generated.
I/we observed this a decade ago when building virtual desktop infrastructure.
There was a Linux Xrdp server (via a bunch of patches that didn't survive)
that was more screen-scraper. VNC has always screen scraped the pixels, so it
"naturally" skips the intermediate frames when the application draws faster
than then remote desktop protocol can keep up.
I thought that there were patches to RDP to make this better, but I never
confirmed this.
next prev parent reply other threads:[~2021-08-28 19:36 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-26 23:25 Kenneth Porter
2021-08-27 10:18 ` Jonathan Morton
2021-08-27 15:36 ` Kenneth Porter
2021-08-27 21:56 ` Kenneth Porter
2021-08-28 19:36 ` Michael Richardson [this message]
2021-08-28 20:07 ` Jonathan Morton
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