Os

Enables optimizations that do not increase code size and produces smaller code size than O2.

Syntax

Linux OS and OS X:

-Os

Windows OS:

/Os

Arguments

None

Default

OFF	Optimizations are made for code speed. However, if O1 is specified, Os is the default.

Description

This option enables optimizations that do not increase code size and produces smaller code size than O2. It disables some optimizations that increase code size for a small speed benefit.

This option tells the compiler to favor transformations that reduce code size over transformations that produce maximum performance.

IDE Equivalent

Windows: Optimization > Favor Size or Speed

Linux: None

OS X: None

Alternate Options