/O
options (Optimize code)
The /O
options control various optimizations that help you create code for maximum speed or minimum size.
/O1
sets a combination of optimizations that generate minimum size code./O2
sets a combination of optimizations that optimizes code for maximum speed./Ob
controls inline function expansion./Od
disables optimization, to speed compilation and simplify debugging./Og
(deprecated) enables global optimizations./Oi
generates intrinsic functions for appropriate function calls./Os
tells the compiler to favor optimizations for size over optimizations for speed./Ot
(a default setting) tells the compiler to favor optimizations for speed over optimizations for size./Ox
is a combination option that selects several of the optimizations with an emphasis on speed./Ox
is a strict subset of the/O2
optimizations./Oy
suppresses the creation of frame pointers on the call stack for quicker function calls.
Remarks
You can combine multiple /O
options into a single option statement. For example, /Odi
is the same as /Od /Oi
. Certain options are mutually exclusive and cause a compiler error if used together. For more information, see the individual /O
options.
See also
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