8 Mar
2014
8 Mar
'14
5:54 p.m.
-1.
mozjpeg offers slightly improved compression at the cost of up to x10 increase in compression time (*). It may be something to consider later if they manage to improve the speed although they expect that it will always remain slower than libjpeg-turbo.
As I quoted before the "defaults are the same as for libjpeg-turbo". The optimisations are enabled for cjpeg and jpegtran but there's a "-fastcrush" option to disable the progressive scan optimization.