GCC Compiler Tests At A Variety Of Optimization Levels Using Clear Linux
Written by Michael Larabel in Software on 27 March 2017. Page 2 of 4. 47 Comments

First up is a look at the FFTW performance with its significant performance improvements when hitting even Og/Os optimizations. Interestingly, -O2 was slightly faster than -O3. The -march=native option yielded slightly improved performance.

Obviously without any optimizations, the build time is quicker.

The test install size changed very little between the different optimization levels.

Interestingly, the -march=native tests were slower than their counterparts.

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