How to reduce code size of iPhone app?
There are a number of things you could do -- 2.5 MB is a small app.
One obvious way is to verify that your binary is in fact stripped. This removes unused references (e.g. functions which are not actually called) and debugging info.
Link Time Optimization (LTO) can save you a ton of space, although that applies to the C and C++ aspects of your program. It brought one of my programs down to about 1/5 the size.
Play with optimization settings.
O3
andO2
often produce a smaller binary thanOs
.Keep track of your dependent libraries. Their exported symbols may be relatively large.
Favor C or C++ for shared libraries in larger projects. If unused, they may be stripped or optimized away.
Minimize
static
data andstatic
functions, restricting their scope to the c, cpp, m, mm file.
I probably wouldn't be overly concerned about the app being 2.5MB, but if you want to do due diligence in making sure you're only including what is really needed, I'd take a look at all of the resource files (images, views, movies, etc) that your project references and make sure that all of them are being used by the application.