Speeding up WordPress / Manage Pages
In one of my projects I am trying to use Wordpress as a CMS. It is working out fine, except for one annoying detail. I have written well over 200 pages of content now (not posts), and in the management interface the “Manage>Pages” page is becoming unbearably slow. In my particular situation it can take well over 35 seconds before it loads.
Time for a little hacking to find out what causes this delay. It turns out that the code for nicely displaying the pages in nested order is not exactly optimized.
The culprit is (mostly) the function page_rows() in /wp-admin/functions/template.php for Wordpress 2.3.2
It loops over all pages for each page to find out the parent-child relationship and this quickly becomes a time waste.
The following quick fix does not solve the inefficiency (the code needs to be rewritten), but it does speed things up quite a bit. By moving the function setup_postdata() out of the search loop a lot of needless initialization is avoided. See the code sample below on how to apply the fix:
/wp-admin/functions/template.php at around line 167:
In my situation, the page loading time goes from 35 seconds down to now 4 seconds which is bearable, but not yet ideal. A better search routine should be able to completely reduce this wait.
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