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$ perl ./tux.pl #  
PostgreSQL 9.4devel_HEAD_20140502_2044_0717748 on x86_64-unknown-linux
+-gnu, compiled by gcc (GCC) 4.9.0, 64-bit
...
where 0=1     0.00002  0.00013  0.00000
where 0=1     0.00002  0.00012  0.00000

use strict;
use warnings;
use DBI;
...
    printf("  %7.5f", tv_interval($t0 , [gettimeofday]));
    print "\n";
}