C:\test>226666
Benchmark:
running
 substr_it, unpack_it
, each for at least 3 CPU seconds
...

 substr_it:  4 wallclock secs ( 3.17 usr +  0.00 sys =  3.17 CPU) @ 2375.99/s (n=7520)

 unpack_it:  4 wallclock secs ( 3.38 usr +  0.00 sys =  3.38 CPU) @ 4371.56/s (n=14754)

            Rate substr_it unpack_it
substr_it 2376/s        --      -46%
unpack_it 4372/s       84%        --
Results tally

C:\test>