What is the WordPress Heartbeat API and what potential performance issue does it cause?

WordPress Fundamental Hard

WordPress Fundamental — Hard

What is the WordPress Heartbeat API and what potential performance issue does it cause?

Key points

  • WordPress Heartbeat API sends AJAX requests for autosave and post locking
  • High-traffic sites with many admin users can experience server load issues
  • The API is a JavaScript/PHP polling mechanism
  • The issue arises from frequent wp-admin/admin-ajax.php requests

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