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The Most Underused Compiler Switches in Visual C++

, March 11, 2014 Microsoft's Visual C++ team explains the nine most underused switches and why you should make sure to include them in your build.
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/fp:fast

When the fp:fast mode is enabled, the compiler relaxes the rules that fp:precise uses when optimizing floating-point operations. This mode allows the compiler to further optimize floating-point code for speed at the expense of floating-point precision.

Additional comments:

fp:fast creates the fastest code. Programs that do not rely on highly precise floating-point computations may experience a significant speed improvement by enabling the fp:fast mode.






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