In VC ++, which means the # pragma equivalent of the / O 2 compiler option (optimization for speed)

Question

According to msdn ,

/ O2 (maximum speed)

equivalently

/ Og / oi / ot / oy / ob2 / gs / gf / gr

and according to msdn , the next pragma

#pragma optimize ("[optim-list]", {on | off})

uses the same letters in its "optimization list" as the / O compiler option. Available letters for pragma are:

• g . Turn on global optimizations.
• p - improves floating point consistency.
• s or t . Specify short or fast sequences of machine code.
• y . Create frame pointers in the program stack.

, , /O2?

Answer 1

:

• /Og
• /Oi .
• /Ot ( ) .
• /Oy .
• /Ob2 , __inline, ,

/G , g t, #pragma intrinsic ( 2), #pragma auto_inline ( 5) , , #pragma inline_depth.

Answer 2

, .

#pragma optimize ( "gty", off)

, /O 2 ,

#pragma optimize ( "gty", on)

: " ", /O 2 /Og/Ot/Oy.

/G, "".