> -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.
