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  perl -MBenchmark -w
    ($s, $t) = qw/ foo xfoox /;
...
  Benchmark: running oful, oless for at least 1 CPU seconds...
        oful:  2 wallclock secs ( 1.08 usr +  0.00 sys =  1.08 CPU) @ 
+2427258.33/s (n=2621439)
       oless:  2 wallclock secs ( 1.15 usr +  0.00 sys =  1.15 CPU) @ 
+1841144.35/s (n=2117316)