On 5 October 2011 20:35, Christian Robottom Reis <k...@linaro.org> wrote: > On Wed, Oct 05, 2011 at 08:09:03PM +0300, Fathi Boudra wrote: >> libjpeg-turbo is available in Oneiric, using v62 emulation. The performance >> improvements aren't significant at the moment. > > What are we using to measure these improvements? What is the -turbo > lib being used for?
We use tjbench to measure the improvements. The browsers (firefox/chromium) is a use case mentioned on the roadmap but I didn't have seen any results. Tom knows more. >> 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. At any rate, -turbo as > an upstream is the only sane decision. > > Who is making the choice from the Ubuntu side -- and is there a bug open > for this? Bill Allombert is libjpeg Debian maintainer. At the moment, Ubuntu is following Debian. There isn't any bug open as the transition didn't started yet. >> There's definitely some work coming to my mind: >> - package libjpeg-turbo with v8 compatibility mode enabled >> - test v8 emulation mode (it seems there's some functions marked as stubs, >> need to be confirmed) >> - run tjbench as part of LAVA tests to get comparisons (plain libjpeg vs ljt) >> - benchmark on Android platform > > Agreed. And you could tack onto this optimizing any other routines that > are not currently NEON optimized and worth it. > >> What's the MM WG plan for ljt? Is there some blueprints in MM WG backlog for >> the items I mentioned? > > Same question here! _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
