hash_pack(512567000151256700025125670003) => 512567000151256700025125670003
     hash_re(512567000151256700025125670003) => 512567000151256700025125670003
 hash_substr(512567000151256700025125670003) => 512567000151256700025125670003
hash_substr2(512567000151256700025125670003) => 512567000151256700025125670003
      hash_c(512567000151256700025125670003) => 512567000151256700025125670003
   hash_pack(512567000251256700015125670003) => 512567000151256700025125670003
     hash_re(512567000251256700015125670003) => 512567000151256700025125670003
 hash_substr(512567000251256700015125670003) => 512567000151256700025125670003
hash_substr2(512567000251256700015125670003) => 512567000151256700025125670003
      hash_c(512567000151256700025125670003) => 512567000151256700025125670003
   hash_pack(512567000351256700015125670002) => 512567000151256700025125670003
     hash_re(512567000351256700015125670002) => 512567000151256700025125670003
 hash_substr(512567000351256700015125670002) => 512567000151256700025125670003
hash_substr2(512567000351256700015125670002) => 512567000151256700025125670003
      hash_c(512567000151256700025125670003) => 512567000151256700025125670003
Benchmark: running hash_c, hash_pack, hash_re, hash_substr, hash_substr2 for at least 5 CPU seconds...
    hash_c:  6 wallclock secs ( 5.71 usr +  0.00 sys =  5.71 CPU) @ 4606276.36/s (n=26301838)
 hash_pack:  6 wallclock secs ( 5.07 usr +  0.00 sys =  5.07 CPU) @ 646938.07/s (n=3279976)
   hash_re:  6 wallclock secs ( 5.03 usr +  0.00 sys =  5.03 CPU) @ 422000.20/s (n=2122661)
hash_substr:  5 wallclock secs ( 5.04 usr +  0.00 sys =  5.04 CPU) @ 328204.96/s (n=1654153)
hash_substr2:  4 wallclock secs ( 5.14 usr +  0.00 sys =  5.14 CPU) @ 965458.95/s (n=4962459)
                  Rate hash_substr    hash_re  hash_pack hash_substr2     hash_c
hash_substr   328205/s          --       -22%       -49%         -66%       -93%
hash_re       422000/s         29%         --       -35%         -56%       -91%
hash_pack     646938/s         97%        53%         --         -33%       -86%
hash_substr2  965459/s        194%       129%        49%           --       -79%
hash_c       4606276/s       1303%       992%       612%         377%         --