Thiago, Thanks for your explanation.
I will try to understand if it is bringing me benefits or not. Regards, Nuno > On 03 May 2016, at 18:18, Thiago Macieira <thiago.macie...@intel.com> wrote: > > On terça-feira, 3 de maio de 2016 18:14:11 PDT Nuno Santos wrote: >> Because, from my experience with the code compiled for Intel, putting -O3 >> made a huge difference on the processing code of my audio app. But the same >> might not be valid for arm. That’s why I’m asking. > > -O3 not only enables all of -O2, but also enables optimisations that increase > code size considerably. One of them is -ftree-vectorize, which is one of the > reasons why your code and QtCore benefit a lot from it. > > I have no clue whether GCC's -ftree-vectorize support on ARM is any good. In > any case, I doubt that you can count on Neon support on all those Android > devices anyway, so it's likely that the gain is minimal anyway. > > PS: QtCore and QtGui are compiled with CONFIG += optimize_full, which enables > -O3. > > -- > Thiago Macieira - thiago.macieira (AT) intel.com > Software Architect - Intel Open Source Technology Center > > _______________________________________________ > Interest mailing list > Interest@qt-project.org > http://lists.qt-project.org/mailman/listinfo/interest
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