• Results with -O3:

    ─❯ ./benchmark                                                         
    2020-11-04T14:08:48+01:00
    Running ./benchmark
    Run on (8 X 4200 MHz CPU s)
    CPU Caches:
      L1 Data 32 KiB (x4)
      L1 Instruction 32 KiB (x4)
      L2 Unified 256 KiB (x4)
      L3 Unified 8192 KiB (x1)
    Load Average: 0.84, 0.89, 0.75
    ***WARNING*** CPU scaling is enabled, the benchmark real time measurements may be noisy and will incur extra overhead.
    -----------------------------------------------------------
    Benchmark                 Time             CPU   Iterations
    -----------------------------------------------------------
    BM_log2_table           262 ns          262 ns      2423124
    BM_log2_builtin        64.0 ns         64.0 ns     10404602
    BM_log2_validate        308 ns          308 ns      2610690
    Edited by Alberto Miranda
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