Daniel-Liu-c0deb0t

/// ntHash constants.
static LUT: [u64; 128] = {
    let mut l = [0u64; 128];
    l[b'A' as usize] = 0x3c8bfbb395c60474u64;
    l[b'C' as usize] = 0x3193c18562a02b4cu64;
    l[b'G' as usize] = 0x20323ed082572324u64;
    l[b'T' as usize] = 0x295549f54be24456u64;
    l
};

Daniel-Liu-c0deb0t

// Surprisingly, the benchmarks in this code do *not* take the same time to run,
// even if the x86-64 CPU supports AVX2 instructions.
//
// Here are the results on my machine with an Intel i7-7500U CPU at 2.7 GHz:
//
// 1. avx_raw: ~80 ns
// 2. avx_with_struct_fn: ~35 ns
// 3. avx_with_fn_mod: ~80 ns
// 4. avx_with_fn: ~80 ns
// 5. avx_with_fn_10: ~11 ns