Amit, I would avoid using NDK at all cost. It will certainly make your project much more complicated and questionably faster. There is lot of pain involved with NDK, like making sure it runs on all metal out there. You will have choice of compiling for all ARM architectures, but without FPU and without THUMB support or compiling for beefier ARM processors, but omitting the weak ones, presumably having a second build for those. I am also not sure about other processors out there. It will certainly become hell in case a popular handest comes out with yet different processor architecture in the future.
If you haven't yet, please have a look at this article: http://developer.android.com/guide/practices/design/performance.html What exact transformations are you looking at, btw? Quite a lot can be achieved by the use of *android.graphics.Matrix* More optimised algorithms are available in the open - there will be some Java examples as well. I would start by looking at some graphics forums and discussion groups. Daniel On 19 Aug, 13:33, Amit <[email protected]> wrote: > Well yes, I only meant that just the fact of using native code (over > Java) won't be very effective. At least that is the impression I have > (which may be wrong). > > Considering the fact that even native code ultimately runs inside the > Dalvik VM instance, performance gains from use of native code would be > modest, right? > > Thanks, > Amit > > On Aug 19, 5:03 pm, Fabrizio Giudici <[email protected]> > wrote: > > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA1 > > > On 8/19/10 13:35 , Amit wrote: > > > > Now, I know that native code will *not* yield any significant > > > performance improvement over Java code > > > Well, specifically for image processing this won't be true, for sure > > up to 2.1 included (as the bytecode is purely interpreted); in 2.2 we > > have JIT, but can't speak as I haven't seen it yet. > > > - -- > > Fabrizio Giudici - Java Architect, Project Manager > > Tidalwave s.a.s. - "We make Java work. Everywhere." > > java.net/blog/fabriziogiudici -www.tidalwave.it/people > > [email protected] > > -----BEGIN PGP SIGNATURE----- > > Version: GnuPG/MacGPG2 v2.0.14 (Darwin) > > Comment: Using GnuPG with Mozilla -http://enigmail.mozdev.org/ > > > iEYEARECAAYFAkxtHakACgkQeDweFqgUGxe83wCfSDP1NEN+TLD0iOCZ/zSvQDRw > > I5cAoJOEoC7eREU5KuPU7m93/GDj9VUr > > =2ZDf > > -----END PGP SIGNATURE----- -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
