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  1. or download this
    my $res = $dbh->selectall_arrayref(<<'SQL');
 SELECT id, title FROM tbl_articles
...
    print "$_->[0]:\n";
    timethis(100, $_->[1]);
 }
  2. or download this
     Using string subst:
 timethis 100: 15 wallclock secs ( 2.33 usr +  0.78 sys =  3.11 CPU)
 Using placeholders:
 timethis 100: 15 wallclock secs ( 2.45 usr +  0.97 sys =  3.42 CPU)