/Os   (Favor Small Code)

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Feature Only in Professional and Enterprise Editions   Code optimization is supported only in Visual C++ Professional and Enterprise Editions. For more information, see .

This option minimizes the size of executable files and DLLs by instructing the compiler to favor size over speed. The compiler can reduce many C and C++ constructs to functionally similar sequences of machine code. Occasionally these differences offer tradeoffs of size versus speed. The /Os and /Ot (Favor Fast Code) options allow you to specify a preference for one over the other:

To find this option in the development environment, click Settings on the Project menu. Then click the C/C++ tab, and click Optimizations in the Category box. Under Optimizations, click Customize.

Note   The /Os and /Ot options have their greatest effect when used with /Og (Global Optimizations).