Michael Jumper closed GUACAMOLE-668.
    Resolution: Won't Do

> Preferring JPEG due to lower CPU usage - controlling guacd behaviour via some 
> kind of preferences
> -------------------------------------------------------------------------------------------------
>                 Key: GUACAMOLE-668
>                 URL: https://issues.apache.org/jira/browse/GUACAMOLE-668
>             Project: Guacamole
>          Issue Type: Wish
>          Components: guacd
>            Reporter: Andrzej Dorobisz
>            Priority: Major
> In our HPC center, we observe that guacamole-server (guacd) is generating 
> quite high CPU-usage even if only one session is currently processed (it 
> reaches 100% when moving window back and forth).
> We have tested that using JPEG instead of PNG in 
> "{{__guac_common_surface_flush_}}_" (_src/common/surface.c_) noticeably 
> decreases the CPU usage. When WebP is available it performs better than PNG 
> but still it's slower (in terms of CPU usage) than JPEG.
> We believe that user running _guacd_ should be able to choose which format is 
> preferred - without recompilation. Our first idea was to use _guacd.conf_ for 
> passing such a preference, but we see that it is not so simple. We have to 
> store such a preference somewhere and then pass it to VNC client which is 
> calling {{__guac_common_surface_flush}} function.
> -------
> What do you think about adding such an ability and what would be the best 
> approach to implement this? If you provide guidance, I can try to implement 
> it.

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