If you are developing MeeGo apps on AppUp, we have some recommendations for you in terms of what you can do to optimization your apps.
If you are using GNU GCC compiler to compile, we recommend using these flags:
-march=atom -O3 -flto -mfpmath=sse -ffast-math
The last flag, -ffast-math, will significantly speed up your mathematical operations especially in loops but it
may also cause your results to lose precisions.