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Benchmark: running BigRE, Index, OptRE, m// loop, each for at least 10
+ CPU seconds...
     BigRE: 11 wallclock secs (10.56 usr +  0.00 sys = 10.56 CPU) @ 11
+690.90/s (n=123491)
     Index: 11 wallclock secs (10.61 usr +  0.00 sys = 10.61 CPU) @ 43
+921.29/s (n=465961)
     OptRE: 11 wallclock secs (10.59 usr +  0.00 sys = 10.59 CPU) @ 17
+239.59/s (n=182619)
  m// loop: 11 wallclock secs (10.50 usr +  0.00 sys = 10.50 CPU) @ 68
+25.71/s (n=71670)

Benchmark: running BigRE, Index, OptRE, m// loop, each for at least 10
+ CPU seconds...
     BigRE: 11 wallclock secs (10.39 usr +  0.00 sys = 10.39 CPU) @ 12
+548.26/s (n=130389)
     Index: 10 wallclock secs (10.53 usr +  0.00 sys = 10.53 CPU) @ 56
+956.89/s (n=599813)
     OptRE: 11 wallclock secs (10.53 usr +  0.00 sys = 10.53 CPU) @ 17
+720.63/s (n=186616)
  m// loop: 11 wallclock secs (10.48 usr +  0.00 sys = 10.48 CPU) @ 78
+73.90/s (n=82550)

Benchmark: running BigRE, Index, OptRE, m// loop, each for at least 10
+ CPU seconds...
     BigRE: 10 wallclock secs (10.59 usr +  0.00 sys = 10.59 CPU) @ 77
+.59/s (n=822)
     Index: 11 wallclock secs (10.50 usr +  0.00 sys = 10.50 CPU) @ 14
+27.58/s (n=14991)
  m// loop: 11 wallclock secs (10.47 usr +  0.00 sys = 10.47 CPU) @ 68
+6.50/s (n=7187)

Benchmark: running BigRE, Index, OptRE, m// loop, each for at least 10
+ CPU seconds...
     BigRE: 10 wallclock secs (10.63 usr +  0.00 sys = 10.63 CPU) @ 20
+25.69/s (n=21523)
     Index: 11 wallclock secs (10.47 usr +  0.00 sys = 10.47 CPU) @ 19
+019.11/s (n=199092)
     OptRE: 11 wallclock secs (10.51 usr +  0.00 sys = 10.51 CPU) @ 27
+02.33/s (n=28415)
  m// loop: 11 wallclock secs (10.45 usr +  0.00 sys = 10.45 CPU) @ 95
+93.84/s (n=100294)

use strict;
use warnings;
use Benchmark;
...
  return 1 if( $string =~ /$byhandre/io );
  0;
}