I Just can NOT understand there is NO solution for this BIG problem.
http://wordpress.org/support/topic/admin-ajaxphp-very-long-loading-time-woocommerce?replies=8"
http://wordpress.org/support/topic/admin-ajaxphp-slow-server-response-time?replies=28"
This solution in my theme functions also does not work:
add_action( 'init', 'my_deregister_heartbeat', 1 );
function my_deregister_heartbeat() {
global $pagenow;
if ( 'post.php' != $pagenow && 'post-new.php' != $pagenow )
wp_deregister_script('heartbeat');
}
PLEASE HELP !!