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Turning off Heartbeat in WordPress made my day!

 4 years ago
source link: https://hiddedevries.nl/en/blog/2016-02-08-turning-off-heartbeat-in-wordpress-made-my-day
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Turning off Heartbeat in WordPress made my day!

08 February 2016 ・ category: code

Heartbeat API is a thing built into WordPress that sends a POST request every 15 seconds. It allows for interesting functionalities like revision tracking, but can also dramatically slow things down and even block editors from editing content (if your connection is quite slow).

The “Edit” pages in WordPress use the Heartbeat API to detect connection loss. If they detect you’ve lost your connection, your ‘Update’/‘Publish’ button will get disabled until your connection is back.

“Connection lost” message on slow connections

When I was working on a WordPress site this week, I accessed the internet through my 3G MiFi, and added a VPN for security (the less glamorous side of working remotely). It resulted in seeing the ‘Connection lost’ message all the time. It would usually appear before I could make any changes, and never disappear. In which case it stopped me from editing content.

Screenshot of error message: connection lost, saving has been disabled until you're reconnected, we're backing up this post just in case.
! The error message

High CPU usage

Others comment that Heartbeat leads to high CPU usage: imagine having multiple instances of WordPress edit pages open in a browser, each sending its own POST requests every 15 seconds.

Turning Heartbeat off

Only when I just turned the whole thing off, I was able to make changes to my page. Turning Heartbeat off can be done by simply deregistering the script: 

add_action( 'init', 'remove_heartbeat');
function remove_heartbeat() {
 wp_deregister_script('heartbeat');
}

(via Aditya Nath Jha

Hidde de Vries (@hdv) is a freelance front-end and accessibility specialist in Rotterdam (NL), conference speaker and workshop teacher. Currently, he works for the W3C in the WAI team (views are his own). Previously he was at Mozilla, the Dutch government and various other organisations and businesses.

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