template-functions-links.php
Change the get_permalink() function from:
$rewritereplace =
array(
date('Y', $unixtime),
date('m', $unixtime),
date('d', $unixtime),
date('H', $unixtime),
date('i', $unixtime),
date('s', $unixtime),
$post->post_name,
$post->ID,
$category,
$author,
$post->post_name,
);
to:
$date = explode(" ",date('Y m d H i s', $unixtime));
$rewritereplace =
array(
$date[0],
$date[1],
$date[2],
$date[3],
$date[4],
$date[5],
$post->post_name,
$post->ID,
$category,
$author,
$post->post_name,
);
This will speed up the function by 50 percent. This is a enormous value if you have to generate permalinks for all of your posts. I hope this will be added to the next release.
