Slow searching for related posts in newer WP versions

  • A client of ours has a site on 3.9.6 that we updated to 4.2.4 and search through content for related posts (the one in edit post page) started delaying the results for 10 seconds and sometimes more. I rolled back to 3.9.6 just to confirm, that speed was way better there.

    Anyone else experiencing this or having an idea of a solution?

    My guess is that changes in the core, especially those with security in wp-db.php are in conflict with some old bad code in the plugin…

    https://www.ads-software.com/plugins/microkids-related-posts/

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