/Ox (Full Optimization) 

Combines optimizing options to produce code that favors execution speed over smaller code size.

/Ox

Remarks

/Ox can be combined with /Os (/Oxs) to favor smaller code size (optimize for size).

In general, /O2 should be preferred over /Ox and /O1 over /Oxs.

Using /Ox is the same as using the following options:

• /Obn, where n = 2

• /Og (Global Optimizations)

• /Oi (Generate Intrinsic Functions)

• /Os, /Ot (Favor Small Code, Favor Fast Code)

• /Oy (Frame-Pointer Omission)

  Note

  The use of Full Optimization implies the use of the Frame Pointer Omission (/Oy (Frame-Pointer Omission)) option.

/Ox is mutually exclusive from:

• /O1, /O2 (Minimize Size, Maximize Speed)

• /O1, /O2 (Minimize Size, Maximize Speed)

• /Od (Disable (Debug))

/Ox also enables the Named Return Value optimization, which eliminates the copy constructor and destructor of a stack based return value. See /O1, /O2 (Minimize Size, Maximize Speed) for more information.

To set this compiler option in the Visual Studio development environment

1. Open the project's Property Pages dialog box. For details, see How to: Open Project Property Pages.

2. Click the C/C++ folder.

3. Click the Optimization property page.

4. Modify the Optimization property.

To set this compiler option programmatically

• See Optimization.

See Also

Reference

/O Options (Optimize Code)
Compiler Options
Setting Compiler Options