> (I am assuming here that libturing is both slower and produces worse quality
> than libx265, if this is not true, the following has of course little
> relevance.)
>

According to the reference I've circulated before we achieve a lower 
compression penalty but we are slower than libx265. Like I said this codec is a 
live project in continuous development.

> I don't think comparing to a reference implementation makes sense if better
> implementations exist and are used.

The coding efficiency provided by the HEVC reference implementation (i.e. HM) 
gives you the "theoretical" limit a standard can achieve. Therefore 
understanding how far a codec is from this theoretical limit is a good 
indication on whether the development is heading in the right direction. Of 
course given the limitations of the reference implementation (i.e. no parallel 
processing, single pass RC, no shot change detection, etc.), it is also wise to 
compare with other practical implementations.


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