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  1. or download this
    use Benchmark qw(cmpthese timethese);
    $rex1=qr!
    ...
    *** PUT SOME HTML/XML HERE ***
    EOFTEXT
    }
    
  2. or download this
    Benchmark: running rex1, rex2 for at least 1 CPU seconds...
          rex1:  1 wallclock secs ( 1.16 usr +  0.00 sys =  1.16 CPU) @ 51
    +.04/s (n=59)
    ...
    rex1 50.6/s 290%   --
    6291
    6291