[RTC] Fix performance regression on post save#76370
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ingeniumed merged 6 commits intotrunkfrom Mar 12, 2026
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Flaky tests detected in 63c880c. 🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/22983699168
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Confirmed that the |
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When the dependant is an object, like With gutenberg/packages/core-data/src/hooks/use-entity-block-editor.js Lines 97 to 102 in 75e9b0c there is a new instance on each change, so in practice the memoization should be ok. However, what we are really trying to memoize here is not the So, a better approach would be to memoize the |
This reverts commit 660a6ec.
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@jsnajdr that was actually the first approach. I wanted to try for something that felt a little more idiomatic which led to the second commit in this PR, but you're right that the goal is really to memoize the internal call to Thanks for the feedback. |
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@jsnajdr it was pointed out to me by @ingeniumed that my first approach was memoizing inside of |
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* Cache block parsing on save * Update to use createSelector * Revert "Update to use createSelector" This reverts commit 660a6ec. * Push memoization down into __unstableSerializeAndClean * Remove old comment * Remove unnecessarily added || '' Co-authored-by: maxschmeling <maxschmeling@git.wordpress.org> Co-authored-by: ingeniumed <ingeniumed@git.wordpress.org> Co-authored-by: Mamaduka <mamaduka@git.wordpress.org> Co-authored-by: jsnajdr <jsnajdr@git.wordpress.org> Co-authored-by: wpsoul <wpsoul@git.wordpress.org>
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I just cherry-picked this PR to the wp/7.0 branch to get it included in the next release: bcf30a6 |
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Yes, the latest version of the patch looks nice, thanks for working on this 👍
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This updates the pinned hash from the `gutenberg` from `9b8144036fa5faf75de43d4502ff9809fcf689ad` to `8c78d87453509661a9f28f978ba2c242d515563b`. The following changes are included: - Navigation Editor: Allow any blocks to be inserted by gating contentOnly insertion rules to section blocks (WordPress/gutenberg#76189) - Add `fetchpriority=low` to `IMG` tags in collapsed Details blocks (WordPress/gutenberg#76269) - Connectors: Add logo URL support for custom AI providers (WordPress/gutenberg#76190) - Cover Block: Add a playlist parameter to loop YouTube background videos. (WordPress/gutenberg#76004) - Connectors: Memoize getConnectors selector (WordPress/gutenberg#76339) - HTML Block: Fix broken layout (WordPress/gutenberg#76278) - Tests: Skip connector logo URL tests when AI Client is unavailable (WordPress/gutenberg#76343) - Navigation Overlay: Explicitly set fetchpriority for images (WordPress/gutenberg#76208) - Connectors: Show API key source for env vars and wp-config constants (WordPress/gutenberg#76355) - Connectors: Move API key validation and masking to REST dispatch level (WordPress/gutenberg#76327) - Connectors: Replace apiFetch with core-data store selectors (WordPress/gutenberg#76333) - Do not sync local attributes (WordPress/gutenberg#76267) - Add `fetchpriority=low` to `IMG` tags in collapsed Accordion Item blocks (WordPress/gutenberg#76336) - Implement disconnection debounce after initial connection (WordPress/gutenberg#76114) - Allow Post Content to be edited when 'Show template' is active and Post content is nested in a Template Part (WordPress/gutenberg#76305) - Fix: Document Bar: Back button flickers (WordPress/gutenberg#76320) - RTC: Move event hooks from editor to core-data (WordPress/gutenberg#76358) - fix(navigation): prevent right-justified submenu overflow in custom overlays (WordPress/gutenberg#76360) - Connectors: Add connectors registry for extensibility (WordPress/gutenberg#76364) - Connectors: Add empty state when no connectors are registered (WordPress/gutenberg#76375) - Temp: Disable RTC in the site editor (WordPress/gutenberg#76223) - Connectors: Add AI Experiments plugin callout with install/activate functionality (WordPress/gutenberg#76379) - Editor: Polish real-time collaboration presence UI and move Avatar to editor package (WordPress/gutenberg#75652) (WordPress/gutenberg#76365) - RTC: Add collaborator selection highlighting in rich text (WordPress/gutenberg#76107) - Sync changes from `wp_enqueue_global_styles()` to Gutenberg override (WordPress/gutenberg#76127) - [RTC] Fix performance regression on post save (WordPress/gutenberg#76370) - Media: Enable AVIF support for client-side uploads (WordPress/gutenberg#76371) - Connectors: Move plugin status computation to script module data (WordPress/gutenberg#76409) - Revisions: Skip rendered fields in REST API responses (WordPress/gutenberg#76347) - E2E Tests: Add connector setup flow tests with test AI provider (WordPress/gutenberg#76433) - RTC: Place sync connection modal in front of popover (WordPress/gutenberg#76431) - Connectors: Sync PHP code with WordPress Core (WordPress/gutenberg#76443) - Editor: Show own presence in collaborative editing sessions (WordPress/gutenberg#76413) (WordPress/gutenberg#76445) A full list of changes can be found on GitHub: https://github.com/WordPress/gutenberg/compare/9b8144036fa5faf75de43d4502ff9809fcf689ad…8c78d87453509661a9f28f978ba2c242d515563b. Log created with: git log --reverse --format="- %s" 9b8144036fa5faf75de43d4502ff9809fcf689ad..8c78d87453509661a9f28f978ba2c242d515563b | sed 's|#\([0-9][0-9]*\)|https://github.com/WordPress/gutenberg/pull/\1|g; /github\.com\/WordPress\/gutenberg\/pull/!d' | pbcopy See #64595. git-svn-id: https://develop.svn.wordpress.org/trunk@61988 602fd350-edb4-49c9-b593-d223f7449a82
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Mar 12, 2026
This updates the pinned hash from the `gutenberg` from `9b8144036fa5faf75de43d4502ff9809fcf689ad` to `8c78d87453509661a9f28f978ba2c242d515563b`. The following changes are included: - Navigation Editor: Allow any blocks to be inserted by gating contentOnly insertion rules to section blocks (WordPress/gutenberg#76189) - Add `fetchpriority=low` to `IMG` tags in collapsed Details blocks (WordPress/gutenberg#76269) - Connectors: Add logo URL support for custom AI providers (WordPress/gutenberg#76190) - Cover Block: Add a playlist parameter to loop YouTube background videos. (WordPress/gutenberg#76004) - Connectors: Memoize getConnectors selector (WordPress/gutenberg#76339) - HTML Block: Fix broken layout (WordPress/gutenberg#76278) - Tests: Skip connector logo URL tests when AI Client is unavailable (WordPress/gutenberg#76343) - Navigation Overlay: Explicitly set fetchpriority for images (WordPress/gutenberg#76208) - Connectors: Show API key source for env vars and wp-config constants (WordPress/gutenberg#76355) - Connectors: Move API key validation and masking to REST dispatch level (WordPress/gutenberg#76327) - Connectors: Replace apiFetch with core-data store selectors (WordPress/gutenberg#76333) - Do not sync local attributes (WordPress/gutenberg#76267) - Add `fetchpriority=low` to `IMG` tags in collapsed Accordion Item blocks (WordPress/gutenberg#76336) - Implement disconnection debounce after initial connection (WordPress/gutenberg#76114) - Allow Post Content to be edited when 'Show template' is active and Post content is nested in a Template Part (WordPress/gutenberg#76305) - Fix: Document Bar: Back button flickers (WordPress/gutenberg#76320) - RTC: Move event hooks from editor to core-data (WordPress/gutenberg#76358) - fix(navigation): prevent right-justified submenu overflow in custom overlays (WordPress/gutenberg#76360) - Connectors: Add connectors registry for extensibility (WordPress/gutenberg#76364) - Connectors: Add empty state when no connectors are registered (WordPress/gutenberg#76375) - Temp: Disable RTC in the site editor (WordPress/gutenberg#76223) - Connectors: Add AI Experiments plugin callout with install/activate functionality (WordPress/gutenberg#76379) - Editor: Polish real-time collaboration presence UI and move Avatar to editor package (WordPress/gutenberg#75652) (WordPress/gutenberg#76365) - RTC: Add collaborator selection highlighting in rich text (WordPress/gutenberg#76107) - Sync changes from `wp_enqueue_global_styles()` to Gutenberg override (WordPress/gutenberg#76127) - [RTC] Fix performance regression on post save (WordPress/gutenberg#76370) - Media: Enable AVIF support for client-side uploads (WordPress/gutenberg#76371) - Connectors: Move plugin status computation to script module data (WordPress/gutenberg#76409) - Revisions: Skip rendered fields in REST API responses (WordPress/gutenberg#76347) - E2E Tests: Add connector setup flow tests with test AI provider (WordPress/gutenberg#76433) - RTC: Place sync connection modal in front of popover (WordPress/gutenberg#76431) - Connectors: Sync PHP code with WordPress Core (WordPress/gutenberg#76443) - Editor: Show own presence in collaborative editing sessions (WordPress/gutenberg#76413) (WordPress/gutenberg#76445) A full list of changes can be found on GitHub: https://github.com/WordPress/gutenberg/compare/9b8144036fa5faf75de43d4502ff9809fcf689ad…8c78d87453509661a9f28f978ba2c242d515563b. Log created with: git log --reverse --format="- %s" 9b8144036fa5faf75de43d4502ff9809fcf689ad..8c78d87453509661a9f28f978ba2c242d515563b | sed 's|#\([0-9][0-9]*\)|https://github.com/WordPress/gutenberg/pull/\1|g; /github\.com\/WordPress\/gutenberg\/pull/!d' | pbcopy See #64595. Built from https://develop.svn.wordpress.org/trunk@61988 git-svn-id: http://core.svn.wordpress.org/trunk@61270 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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What?
Fixes #76352
Why?
The CRDT sync system always includes blocks in the changes it dispatches to the entity store on initialization, even when the blocks haven't changed. This is by design — the comment in getPostChangesFromCRDTDoc notes that "consumers of blocks have memoization that renders optimization here unnecessary."
However, the
getEditedPostContentselector — one such consumer — had no memoization. It's a createRegistrySelector that calls__unstableSerializeAndClean(record.blocks)on every access, which invokes each block's save function. Before collaboration, this code path was rarely hit because blocks was never set directly in entity edits (it was derived from content via the transient read callback). With collaboration enabled, the sync system sets blocks in entity edits on load, causing this branch to run on every selector access across all subscribed components.How?
Wraps
getEditedPostContentwithcreateSelector, using[record?.content, record?.blocks]as dependants. The expensive serialization now runs once per unique blocks/content reference and returns the cached result for all subsequent accesses within the same state.Testing Instructions
Follow the reproduction steps from the linked issue. There is a simple plugin that registers a block that will
console.logevery time thesavefunction is called. Before this fix you will see it fire many times on post save, and then much fewer after this fix.