Main competitor is Zlib encoder, and that is why improvements in compression ratio for the Tight-1.1 encoder against Zlib are emphasized using red color for text. In the bottom of this page you can find more information on testing and other related issues. Note that all test sessions as well as complete source code for testing utility are freely available for everybody. But you should be aware that some of test sessions are huge downloads and they may reside behind a very slow Internet connection. Browser is showing Bugzilla Web site .
Original session is available from the rfbproxy Web pages.
Test shows good compression performance achieved by the Tight Encoder on typical session where not many full-color areas can be found on the screen. Most improvement in both compression ratio and compression time is caused by replacing true-color RGB samples with indexed colors before compression. Tight encoder is about ten times faster on this session as compared to Zlib encoder. So the input stream size for final zlib compressor may be up to 16 times smaller. And compression speed is increased dramatically just because there is much less data to compress.