Slow the beat down, hand the cron over.
The heartbeat requests in the backend come in every 15 seconds by default. You raise the interval. And on request the kakapo defines DISABLE_WP_CRON, so that scheduled tasks run via a real system cron instead of on every page view.
Raise the Heartbeat interval · the default is 15 seconds
Choose the interval in seconds
Hand off WP-Cron or keep it
Set up a system Cron at your host
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