| title | -O Options (Optimize Code) | Microsoft Docs | |||||||||||||
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| ms.date | 11/04/2016 | |||||||||||||
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| ms.assetid | 77997af9-5555-4b3d-aa57-6615b27d4d5d | |||||||||||||
| caps.latest.revision | 11 | |||||||||||||
| author | corob-msft | |||||||||||||
| ms.author | corob | |||||||||||||
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The /O options control various optimizations that help you create code for maximum speed or minimum size.
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/O1 optimizes code for minimum size.
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/O2 optimizes code for maximum speed.
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/Ob controls inline function expansion.
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/Od disables optimization, speeding compilation and simplifying debugging.
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/Og enables global optimizations.
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/Oi generates intrinsic functions for appropriate function calls.
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/Os tells the compiler to favor optimizations for size over optimizations for speed.
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/Ot (a default setting) tells the compiler to favor optimizations for speed over optimizations for size.
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/Ox selects full optimization.
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/Oy suppresses the creation of frame pointers on the call stack for quicker function calls.
You can also combine multiple /O options into a single option statement. For example, /Odi is the same as /Od /Oi.