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PO
 

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    <p>Oddly. but in my experience TeamViewer is not faster/more responsive than VNC, only easier to setup. I have a couple of win-boxen that I VNC over OpenVPN into (so there is another overhead layer) and that's on cheap Cable (512 up) and I find properly setup TightVNC to be much more responsive than TeamViewer to same boxen. RDP (naturally) even more so since by large part it sends GUI draw commands instead of bitmap tiles.</p> <p>Which brings us to:</p> <ol> <li><p>Why are you not using VNC? There are plethora of open source solutions, and Tight is probably on top of it's game right now.</p></li> <li><p>Advanced VNC implementations use lossy compression and that seems to achieve better results than your choice of PNG. Also, IIRC the rest of the payload is also squashed using zlib. Bothj Tight and UltraVNC have very optimized algos, especially for windows. On top of that Tight is open-source.</p></li> <li><p>If win boxen are your primary target RDP may be a better option, and has an opensource implementation (rdesktop)</p></li> <li><p>If *nix boxen are your primary target NX may be a better option and has an open source implementation (FreeNX, albeit not as optimised as NoMachine's proprietary product).</p></li> </ol> <p>If compressing JPEG is a performance issue for your algo, I'm pretty sure that image comparison would still take away some performance. I'd bet they use best-case compression for every specific situation ie lossy for large frames, some quick and dirty internall losless for smaller ones, compare bits of images and send only diffs of sort and bunch of other optimisation tricks.</p> <p>And a lot of those tricks must be present in Tight > 2.0 since again, in my experience it beats the hell out of TeamViewer performance wyse, YMMV.</p> <p>Also the choice of a JIT compiled runtime over something like C++ might take a slice from your performance edge, especially in memory constrained machines (a lot of performance tuning goes to the toilet when windows start using the pagefile intensively). And you will need memory to keep previous image states for internal comparison atop of what DF mirage gives you.</p>
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    1. POHow is TeamViewer so fast?
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    1. COIt annoys me when people suggest VNC as an alternative to TeamViewer. I would suggest that perhaps you've not used TeamViewer to know of the advantages it gives over free software like VNC? VNC might be OK for accessing your own computer, but for screen sharing and hosting meetings etc, it doesn't even vaguely compare. Last time I checked, VNC didn't even have any open relay servers, so it wouldn't even work in 95% of cases as it would be firewalled out (unless you own and operate your own firewall or server).
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    2. COThe discussion was not about VNC client tools versus TeamViewer (of which I EXTENSIVELY use both on daily basis, tho I do operate a lot of firewalls and servers and own quite a few). The discussion was about internal work of protocols and implementing them
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