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FIX Slow WordPress Editor
// A fix for the horribly slow WordPress post and product editor
// With many thanks to Jon Brown
// Read about it at
* Remove Ancient Custom Fields metabox from post editor
* because it uses a very slow query meta_key sort query
* so on sites with large postmeta tables it is super slow
* and is rarely useful anymore on any site
function s9_remove_post_custom_fields_metabox() {
foreach ( get_post_types( '', 'names' ) as $post_type ) {
remove_meta_box( 'postcustom' , $post_type , 'normal' );
add_action( 'admin_menu' , 's9_remove_post_custom_fields_metabox' );
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