Allows you to fine-tune the WordPress Heartbeat API frequency and behavior:
- Pause the Heartbeat API (useful for debugging).
- Decrease Heartbeat API frequency (useful when having performance issues on the site).
- Automatically decreases the frequency when the site is having performance issues (useful for mitigating attacks).
- Automatically decreases the frequency when the last heartbeat ajax call failed (useful for helping the server bounce back).
- Allows you to manually control the frequency.