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C:\>perl -MO=Deparse -we "$a = 'doit'; print \"hi\n\" if $a eq 'doit'"
$a = 'doit';
...
    print "hi\n";
}
-e syntax OK

#!perl -w
use strict;
...
Benchmark: running normal, reverse, each for at least 5 CPU seconds...
    normal:  5 wallclock secs ( 5.27 usr +  0.00 sys =  5.27 CPU) @ 15
+65443.64/s (n=8249888)
   reverse:  4 wallclock secs ( 5.11 usr +  0.00 sys =  5.11 CPU) @ 15
+85628.38/s (n=8102561)