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#!perl
use Benchmark;
...
use_global_vars: 10 wallclock secs (10.54 usr +  0.02 sys = 10.56 CPU)
+ @ 561.35/s (n=5925)
use_lexical_hash: 11 wallclock secs (10.65 usr +  0.00 sys = 10.65 CPU
+) @ 794.74/s (n=8460)