andrewsali opened a new pull request #322:
URL: https://github.com/apache/guacamole-server/pull/322


   This PR is based on re-evaluating WebP lossless and is meant for testing and 
opening a discussion. The background is the question and response (by 
@mike-jumper  and @necouchman ) here: 
http://mail-archives.apache.org/mod_mbox/guacamole-dev/202008.mbox/browser
   
   Based on our testing, using a very-fast WebP lossless compression 
significantly improves the responsiveness (e.g. scrolling, moving windows 
around) of Guacamole compared to the default settings. This was tested using 
libwebp > 0.6.1. 
   
   In our configuration there is little latency between the Remote Desktop 
server and the Guacamole gateway, so most of the latency was due to the 
compression time for PNG. With using fast WebP this is much improved. 
   
   It might be possible that our results differ from the original evaluation of 
WebP due to network bandwith improving faster than compute speed over the last 
few years. 
   
   Caveat: It might also be the case that if there is much latency between the 
Remote Desktop server and the Gateway, then this change doesn't have a 
beneficial effect.
   
   This PR is of course just a suggestion, feel free to discard, however it 
might be worthwhile to test in different scenarios as per our testing the UX is 
much improved.


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