Comment by hmsync

Just run the author's benchmark program on my i5-9600k:

    |          | i5-9600k     | i7-7700HQ | Apple M1  |  
    |strtod    | 217.97 MB/s  | 80 MB/s   | 115 MB/s  |  
    |abseil    | 613.48 MB/s  | 460 MB/s  | 580 MB/s  |  
    |fastfloat | 1400.15 MB/s | 1000 MB/s | 1800 MB/s |