Editing dashboard is extreme slow and results in

Editing my dashboard is horrible. Everything respons very slow, think lags of 10 seconds. Hitting the save button seems not to result in saving, the dialog keeps open.

Weird thing, the dashboard itself isn’t slow. Nor is my internet connection. My dashboard is around 7.000 lines of code.

Frequently I get this error when saving or closing a dialog:


Hitting reload won’t change anything. Just shift-f5’ing to go back.

Where do I need to begin debugging this?

Open the web browser inspector console and look for errors.

My guess would be a misbehaving third party card.

Or the browser itself. This is all client code.
Whatever browser you’re using (likely chromium based), try , e.g, firefox to see if the behaviour is the same.

Good tip. And I did, it’s as colorful as my Christmas tree… but I am not sure what to do…

This is the output. The list of mini-graph goes on.


Do you know what is really slowing it down?

@koying it’s both on Safari and Chrome.

just to confirm, I’m experiencing that slowness too.
maybe not as extreme as described by the OP. But fairly disturbing

Not really sure, but as far as I remember closing and reopening HA webpage helps (chrome)

The issue must have been introduced within the last five months.

Check if the problem exists in a Safe mode.
Also, some browser extensions can “help” to slow down.

That is a huge amount of custom cards. Simplify.

You also appear to have network issues. Lots of unreachable resources.