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dcommander committed Apr 13, 2012
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19 changes: 10 additions & 9 deletions doc/compatibility.txt
Original file line number Diff line number Diff line change
Expand Up @@ -78,10 +78,11 @@ TurboVNC with other VNC flavors.
similarly to TurboVNC, barring the absense of multithreading in the former,
but this requires using non-default settings in TigerVNC. The default
TigerVNC settings are roughly equivalent to Compression Level 2 in
TurboVNC, which will produce significantly slower performance than
Compression Level 1 on 3D and video workloads. Compression Level 1 should
be used in TigerVNC in order to simulate the behavior of TurboVNC's
"Tight + JPEG" encoding methods.
TurboVNC, which will use significantly more CPU time than Compression
Level 1. Additionally, TigerVNC does inter-frame comparison by default
whenever Compression Level 2 or above is selected, and this increases CPU
time even more. Compression Level 1 should be used in TigerVNC in order to
simulate the behavior of TurboVNC's "Tight + JPEG" encoding methods.

** TightVNC or TigerVNC Viewers

Expand All @@ -105,11 +106,11 @@ TurboVNC with other VNC flavors.
level beyond this, except on rare corner cases (such as the console output
of a large compilation) that are not performance-critical to begin with.
In general, increasing the Compression Level from 1 to 2 with JPEG enabled
will increase the CPU usage for 3D and video workloads without providing
any significant bandwidth savings. However, Compression Level 2 can be
shown to reduce bandwidth for some 2D workloads, particular those with low
numbers of unique colors, by 20-40% (with a commensurate increase
in CPU usage.)
will increase the CPU usage for most 3D and video workloads without
providing any significant bandwidth savings. However, Compression Level 2
can be shown to reduce bandwidth by 20-40% (with a commensurate increase in
CPU usage) for certain types of workloads that have low numbers of unique
colors.
{nl}{nl}

** RealVNC
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18 changes: 10 additions & 8 deletions doc/index.html
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Expand Up @@ -3,7 +3,7 @@
<head>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
<meta name="language" content="en">
<meta name="date" content="2012-04-05T01:23:27">
<meta name="date" content="2012-04-13T05:10:56">
<meta name="generator" content="deplate.rb 0.8.5">
<title>User&rsquo;s Guide for TurboVNC 1.1</title>
<link rel="start" href="index.html" title="Frontpage">
Expand Down Expand Up @@ -1705,10 +1705,12 @@ <h2 id="hd009001">9.1&nbsp;TightVNC or TigerVNC Servers</h2>
perform similarly to TurboVNC, barring the absense of multithreading in
the former, but this requires using non-default settings in TigerVNC.
The default TigerVNC settings are roughly equivalent to Compression
Level 2 in TurboVNC, which will produce significantly slower performance
than Compression Level 1 on 3D and video workloads. Compression Level 1
should be used in TigerVNC in order to simulate the behavior of
TurboVNC&rsquo;s &ldquo;Tight + JPEG&rdquo; encoding methods.
Level 2 in TurboVNC, which will use significantly more CPU time than
Compression Level 1. Additionally, TigerVNC does inter-frame comparison
by default whenever Compression Level 2 or above is selected, and this
increases CPU time even more. Compression Level 1 should be used in
TigerVNC in order to simulate the behavior of TurboVNC&rsquo;s
&ldquo;Tight + JPEG&rdquo; encoding methods.
</li>
</ul>

Expand Down Expand Up @@ -1740,10 +1742,10 @@ <h2 id="hd009002">9.2&nbsp;TightVNC or TigerVNC Viewers</h2>
cases (such as the console output of a large compilation) that are not
performance-critical to begin with. In general, increasing the
Compression Level from 1 to 2 with JPEG enabled will increase the CPU
usage for 3D and video workloads without providing any significant
usage for most 3D and video workloads without providing any significant
bandwidth savings. However, Compression Level 2 can be shown to reduce
bandwidth for some 2D workloads, particular those with low numbers of
unique colors, by 20-40% (with a commensurate increase in CPU usage.)
bandwidth by 20-40% (with a commensurate increase in CPU usage) for
certain types of workloads that have low numbers of unique colors.
<br /><br />
</li>
</ul>
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