/Ob (Inline Function Expansion)
Controls inline expansion of functions.
The compiler treats the inline expansion options and keywords as suggestions. There is no guarantee that functions will be expanded inline. You cannot force the compiler to inline a particular function.
Information that is gathered from profiling test runs will override optimizations that would otherwise be in effect if you specify /Ob, /Os, or /Ot. For more information, Profile-Guided Optimizations.
To set this compiler option in the Visual Studio development environment
Open the project's Property Pages dialog box. For details, see How to: Open Project Property Pages.
Click the C/C++ folder.
Click the Optimization property page.
Modify the Inline Function Expansion property.