Redux-toolkit: Extreme CPU usage while reading the tutorials

[RayVR]

I'm getting 95%+ CPU usage while trying to read through the tutorial. Safari actually warned me the site was using significant resources. I don't see anything on these pages that should cause this so thought it could be a bug.

This is with Safari 14.0.2 on MacOS 11.1.
Chrome 87.0.4280.141 did not show the same high CPU usage.

[msutkowski]

Could you link to the particular page? It's most likely codesandbox

[RayVR]

https://redux-toolkit.js.org/tutorials/intermediate-tutorial is one example. The beginner tutorial showed the same issues.

[LeadProgramming]

I can barely scroll through the page without it freezing intermittently. I thought my iPhone was toast. Please fix I am still reading 😥

[markerikson]

I can only assume this is the CodeSandboxes that are in the page.

FWIW, we're debating removing the existing RTK tutorials, because the new "Redux Essentials" and "Redux Fundamentals" in the core docs do a better job of teaching Redux and RTK. I'd suggest reading those first:

https://redux.js.org/tutorials/index

[msutkowski]

@RayVR @LeadProgramming Can you try looking at the tutorials here and let us know if it helps? https://deploy-preview-880--redux-starter-kit-docs.netlify.app/tutorials/intermediate-tutorial

[RayVR]

@msutkowski The linked page resolves the issue.

[markerikson]

Cool. Ok, merged that PR.

@msutkowski , could you do me a favor and update all the Redux core sandboxes the same way?