On 6 October 2011 00:43, Mans Rullgard <mans.rullg...@linaro.org> wrote: > On 5 October 2011 18:35, Christian Robottom Reis <k...@linaro.org> wrote: >> On Wed, Oct 05, 2011 at 08:09:03PM +0300, Fathi Boudra wrote: >>> Debian/Ubuntu P are going to move to libjpeg8 by default making >>> current package obsolete in the future. >> >> Note that when we asked Darrell about this he questioned the performance >> benefits of version 8. Mans probably knows more. > > There is no benefit to v8. v7 added support for the rarely/never used > arithmetic coding option, left out of earlier versions due to patent > issues. Since nobody uses this mode, supporting it is irrelevant. > v8 only adds some experimental, non-standard coding options even less > relevant to any real-world uses. What is relevant is, however, that > v8 is significantly slower than v6 in the default configuration. I > don't remember if this slowdown was present already in v7.
According to Bill Allombert, v8 support more image format and provide a higher image quality. There's probably benefit to v8 if a distribution switch from v6 to v8. Though, performance is more relevant to us (point taken for v6). >> At any rate, -turbo as an upstream is the only sane decision. > > Agreed. > > -- > Mans Rullgard / mru _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
