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Update INSTALL.md 

correct usage of march native compile option
release/4.3a0
Steve Oswald 2023-10-01 22:32:26 +02:00 committed by GitHub
parent 8d995c9bde
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INSTALL.md
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@ -182,7 +182,7 @@ Here are some tips to get the best possible performance out of GTSAM.
optimization by 30-50%. Please note that this may not be true for very small
problems where the overhead of dispatching work to multiple threads outweighs
the benefit. We recommend that you benchmark your problem with/without TBB.
3. Add `-march=native` to `GTSAM_CMAKE_CXX_FLAGS`. A performance gain of
3. Use `GTSAM_BUILD_WITH_MARCH_NATIVE`. A performance gain of
25-30% can be expected on modern processors. Note that this affects the portability
of your executable. It may not run when copied to another system with older/different
processor architecture.