Two major improvements that you're probably observing: -- The addition of RFB flow control extensions in TigerVNC 1.2. These allow the server to monitor the TCP buffers and network performance to determine the maximum update rate that it can sustain, based on the network performance and the client's ability to process the updates. Thus, the server now pushes out updates at the maximum rate, rather than waiting for the client to request each new update. The latter behavior, which has existed in VNC since its inception and which is still the behavior of every other implementation of VNC except for TigerVNC 1.2+ and TurboVNC 1.2+, causes a full round trip from server to client with every update. Thus, on a high-latency network, the performance could easily become latency-limited to a maximum update rate of 1 / (ping time), rather than being bandwidth-limited. For instance, on a 200ms connection, the old client-pull method of sending updates would become limited to 5 updates/sec, regardless of the capacity of the network.
-- The other major change between TigerVNC 1.1 and 1.2 was a refactoring of the Tight encoder, which now uses encoding methods similar to those used by the TurboVNC encoder. These new encoding methods do a better job of processing updates that have a lot of solid color in them, and the new methods adjust the mix of subrectangles to favor the use of JPEG more. This can significantly reduce the network footprint of TigerVNC in some cases. On 1/23/14 11:40 PM, vrkor...@yahoo.co.in wrote: > Hi, > I observed significant performance improvements with ver1.3 when > compared to ver 1.0.1 especially over WAN. > Where can I get the details of what is changed between these two > versions and the main reasons fro the performance improvement? > Regards, > Venkat ------------------------------------------------------------------------------ CenturyLink Cloud: The Leader in Enterprise Cloud Services. Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical Workloads, Development Environments & Everything In Between. Get a Quote or Start a Free Trial Today. http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk _______________________________________________ Tigervnc-users mailing list Tigervnc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/tigervnc-users
