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Trello consumes high CPU in Safari

Ilia S.

Hi,

I'm a web developer and using Trello for everyday tasks, thank you for such a great product.

2 days ago Trello started to consume lots of CPU in my favorite browser, Safari 13.1.2. There's no such issue in Chrome.

No other tabs are open. No intensive usage of cards. Does not matter which board is currently open. And I have Macbook Pro 2019 with 2.4 GHz 8-Core Intel Core i9.

I'm also having troubles with uploading images in cards. Maybe these issues are related.

Screen Shot 2020-09-17 at 8.59.53 AM.png Screen Shot 2020-09-17 at 9.00.05 AM.png

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Michael Pryor

Have you tried to see if you can reproduce in Safari Private mode?

dominik.stypula

@Michael Pryor

Hi, I'm a web developer.
In the Chrome's Task Manager - Trello Board tab uses > 85% of the CPU.

I disabled ALL my extensions before the test. I'm just logged in to my Google Account.

Agree on that if you switch to Incognito Mode the problem does not exist.
But does that mean we have to use Incognito Mode to use the Trello?

I didn't see that problem in the other javascript-rich applications like Gmail, Google Sheets etc.

FYI: Problem doesn't exist if task is opened in modal, only if the trello board is opened, and tab is active.

Michael Pryor

You can try to delete your cookies and cache but the only difference between incognito mode and regular is

- no prior cookies or cache

- no extensions enabled

If you continue to get odd behavior after resetting cookies and cache and you have all extensions disabled then my guess would be there is still an extension enabled.

dominik.stypula

@Michael Pryor

This is certainly NOT an extension problem.

Only thing that I did was to remove ALL COOKIES from Trello domain and the problem is gone.

I've enabled all the extensions again, and none is causing the problem.

I assume that it's something with Trello cookies, or the localStorage.
For now I cannot reproduce the issue.

If I stumble on it again I'll let you know.

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