Hey, good idea.
The unpack solution assumes the length of the string is 8.
It'll get a bit slower if it's generalized.
Update: Strike that. unpack "A*" runs faster than
unpack "A8" on my machine. Anyone have an idea why that
Benchmark: timing 1000000 iterations of unpack*, unpack8...
unpack*: 7 wallclock secs ( 6.65 usr + 0.00 sys = 6.65 CPU)
unpack8: 8 wallclock secs ( 7.40 usr + 0.00 sys = 7.40 CPU)
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