Solve slow WP response in cron.php

Whenever I upgrade to a newer release of WP, I experience slowness in WP when I am editing/saving posts. Anything that requires an answer from WP takes forever…. until I edit CRON.PHP

I found it somewhere on this forum, and it works every time. I search in WP-INCLUDES/CRON.PHP for the line:

$argyle = @ fsockopen( $parts[‘host’], $port, $errno, $errstr, 0.01 );

and I replace it with:

$argyle = @ fsockopen( $parts[‘scheme’].’://’.$parts[‘host’], $_SERVER[‘SERVER_PORT’], $errno, $errstr, 0.01 );

and responses return to normal. Now this fix has been around for a while, and I was wondering: Why it is not implemented in the worked over CRON.PHP of the new WP versions? There might be a very good reason for that and maybe I am taking a chance here.

Can anyone shed some light on this? Thanks in advance,

Carlo