The /Ox compiler option produces code that favors execution speed over smaller size.
/Ox
Remarks
Specifying the /Ox compiler option is the same as using the following options:
/Ob (Inline Function Expansion), where the option parameter is 2 (/Ob2)
/Ox is mutually exclusive from:
The /Ox compiler option also enables the Named Return Value optimization, which eliminates the copy constructor and destructor of a stack based return value. For more information, see /O1, /O2 (Minimize Size, Maximize Speed).
You can cancel out the /Ox compiler option if you specify /Oxs, which combines the /Ox compiler option with /Os (Favor Small Code). The combined options favor smaller code size.
In general, specify /O2 (Maximize Speed) instead of /Ox, and /O1 (Minimize Size) instead of /Oxs.
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 Optimization property.
To set this compiler option programmatically
- See Optimization.