Pagoda wrote:
>
> Can I improve the performance of script by using constant?
You can use the Benchmark module to test the performance of different
options.
> Which is the better one?
>
> use constant const => 1e-12
>
> or
>
> my $const = 1e-12
use works at compile time and replaces the constant name with the
constant value so it should be faster.
$ perl -MO=Deparse -le' use constant one => 1e-12; print one '
sub one () {
package constant;
$scalar;
}
print 1e-12;
-e syntax OK
John
--
use Perl;
program
fulfillment
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