Using a for loop

  my $N = 100000;                  my $N = 100000;
  my $i = 0;                       my $i = 0;
  my $j = 0;                                       
  
  # start timer                    # start timer
  while $j < $N {                  for 0..^$N  -> $j {
      $i = $i + $j;                    $i = $i + $j;
      $j = $j + 1;                 }
  }
  # stop timer                     # stop timer

Results (seconds):

              2011.01 

while 0..^N    23.04