PDL should be faster (after compilation)
#!/usr/bin/perl --
use strict;
use warnings;
use PDL;
use Inline qw( Pdlpp );
print pdl(1)->eight,"\n";
print pdl(10)->eight,"\n";
print pdl(100)->eight,"\n";
print pdl(100000000 )->eight,"\n";
__DATA__
__Pdlpp__
pp_addhdr( '
double eight_sum(int n)
{
int i, sum = 0;
for (i=1; i<=n; i++) {
sum += i;
}
return sum;
}
' );
pp_def(
'eight',
Pars => 'int a(); int [o]b();',
Code => '$b()=eight_sum($a());'
);
pp_done();
On my system
time perl inline.pdlpp2.pl
1
55
5050
987459712
real 1.00
user 0.00
sys 0.00
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