GCC 13 "-O2" Performance Being Sped Up With Enabling Small Loop Unrolling

For those compiling their programs using the common "-O2" optimization level as is used for the production builds by many Linux distributions and other software vendors, small loop unrolling is being enabled at this level for GCC 13. Enabling small loop unrolling with -O2 should help the performance in some areas of modern Intel and AMD CPUs...