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Optimization flags

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The fastest and simplest combination I found is -Ofast -static. And I also tried -mtune=haswell and Profile Guided Optimization, but it didn't improve the computation time.

Is there anything else I can do in terms of compilation options?

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When the executable is to be run on the same system as the build is performed

   -xHost   (Linux/macOS)
   /QxHost (Windows)

Jim Dempsey

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When the executable is to be run on the same system as the build is performed

   -xHost   (Linux/macOS)
   /QxHost (Windows)

Jim Dempsey

View solution in original post

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Black Belt Retired Employee
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You can try -fast as a simple shortcut - this sets several options that usually (but not always) improve computation performance. Be aware that this implies -xHost which optimizes for the CPU you compiled on. If you'll be running the program elsewhere, don't use either of these.

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