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Navigation Link: Avoid unnecessary re-renders #40696

Merged
merged 1 commit into from Apr 29, 2022
Merged

Navigation Link: Avoid unnecessary re-renders #40696

merged 1 commit into from Apr 29, 2022

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Mamaduka
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@Mamaduka Mamaduka commented Apr 28, 2022 •
edited

What?

Discovered while testing #40357.

The Navigation Link block was constantly re-rendering even when typing into a different block.

Why?

Re-rendering affected typing performance, especially if you've got a few large Navigation blocks on the page.

How?

The re-rendering issue was caused by blockTransforms changing on every store update. The NavigationLinkEdit component doesn't need this state, so I moved useSelect inside LinkControlTransforms.

P.S. While this is a valid fix. As a follow-up, we might want to look into the getBlockTransformItems selector performance.

Testing Instructions

  1. Open a Post or Page.
  2. Insert a Navigation Block.
  3. Select or create a menu with a few items.
  4. Confirm that link transformation works.
  5. Confirm that block doesn't re-render when typing into a paragraph using React DevTools.

Screenshots or screencast

Before

CleanShot.2022-04-28.at.21.16.21.mp4

After

CleanShot.2022-04-28.at.21.17.11.mp4

@Mamaduka Mamaduka requested a review from tellthemachines as a code owner Apr 28, 2022
@Mamaduka Mamaduka self-assigned this Apr 28, 2022
@Mamaduka Mamaduka added [Block] Navigation Link [Type] Bug An existing feature is broken. [Type] Performance Backport to WP Beta/RC PRs to be back-ported to the WordPress major release that's currently in beta. and removed [Type] Bug An existing feature is broken. labels Apr 28, 2022
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github-actions bot commented Apr 28, 2022 •
edited

Size Change: -17 B (0%)

Total Size: 1.23 MB

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ℹ️ View Unchanged
Filename Size
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compressed-size-action

@Mamaduka Mamaduka force-pushed the fix/navigation-link-rerenders branch from 0551727 to 3586560 Compare Apr 29, 2022
talldan
talldan approved these changes Apr 29, 2022
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@talldan talldan left a comment

Nice work! 🎉

@Mamaduka Mamaduka merged commit 2897371 into trunk Apr 29, 2022
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@Mamaduka Mamaduka deleted the fix/navigation-link-rerenders branch Apr 29, 2022
@github-actions github-actions bot added this to the Gutenberg 13.2 milestone Apr 29, 2022
@Mamaduka Mamaduka mentioned this pull request Apr 29, 2022
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@getdave getdave mentioned this pull request Apr 29, 2022
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adamziel pushed a commit that referenced this issue Apr 29, 2022
@Mamaduka @adamziel
Navigation Link: Avoid unnecessary re-renders (#40696)
d093cc1
@adamziel
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adamziel commented Apr 29, 2022

I cherry picked this change into wp/6.0 branch to be included in WordPress 6.0 Beta 4 on Monday: d093cc1

@adamziel adamziel removed the Backport to WP Beta/RC PRs to be back-ported to the WordPress major release that's currently in beta. label Apr 29, 2022
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