Backoffice Performance: Add inflight request deduplication to item data request managers by madsrasmussen · Pull Request #21767 · umbraco/Umbraco-CMS

madsrasmussen · 2026-02-16T12:31:19Z

Adds an in-flight request cache to all item data request managers to prevent duplicate API calls when multiple components concurrently request the same items. This has currently only been implemented when requesting "detail" data.

Problem

When multiple UI components request the same item data simultaneously (e.g., during page load), each request independently hits the server — even if another request for the same IDs is already in-flight. This results in redundant API calls and unnecessary load.

Solution

Introduces UmbManagementApiInFlightRequestCache as a static per-manager cache that tracks in-progress requests. When a getItems() call is made, the manager now:

Checks the data cache for already-resolved items
Checks the inflight cache for items currently being fetched by another call
Only requests items from the server that are neither cached nor in-flight

Concurrent calls with overlapping IDs will share the same server response rather than making separate requests.

Example

// Two concurrent calls happening at the same time:
Call A: getItems(['item-1', 'item-2', 'item-3'])
Call B: getItems(['item-2', 'item-3', 'item-4'])

// Before (2 full server requests):
Request 1: GET /item?id=item-1&id=item-2&id=item-3
Request 2: GET /item?id=item-2&id=item-3&id=item-4

// After (2 smaller requests, no overlap):
Request 1: GET /item?id=item-1&id=item-2&id=item-3  (from Call A)
Request 2: GET /item?id=item-4 (from Call B, item-2 & item-3 reused from Call A's inflight promise)

Testing Example

Set up multiple Document Pickers.
Pick documents that overlap between the pickers.
Notice in the network requests that we never request the same item twice.

Document Pickers with overlapping selection

Network inspection
In total, we requested 6 items. Each picker requests only items that are not already cached or in-flight.

Copilot

Pull request overview

This PR introduces in-flight request deduplication for all item data request managers in the Umbraco backoffice to prevent duplicate API calls when multiple UI components request the same items concurrently. The implementation adds a new UmbManagementApiInFlightRequestCache class and updates 20 item request managers to use it.

Changes:

Introduced UmbManagementApiInFlightRequestCache class to track in-progress requests per manager type
Modified UmbManagementApiItemDataRequestManager to deduplicate concurrent requests by checking inflight cache before making API calls
Updated all 20 item request managers to instantiate and provide a static inflight cache instance
Added comprehensive unit tests covering deduplication scenarios and edge cases

Reviewed changes

Copilot reviewed 21 out of 21 changed files in this pull request and generated no comments.

File	Description
src/Umbraco.Web.UI.Client/src/packages/management-api/inflight-request/cache.ts	New cache class for tracking in-flight requests with get/set/has/delete/clear operations
src/Umbraco.Web.UI.Client/src/packages/management-api/item/item-data.request-manager.ts	Core deduplication logic: splits IDs into cached/inflight/new, creates deferred promises per item, resolves from shared batch responses
src/Umbraco.Web.UI.Client/src/packages/management-api/item/item-data.request-manager.test.ts	Comprehensive test suite covering concurrent requests, cache behavior, and cleanup
src/Umbraco.Web.UI.Client/src/packages//repository/item/-item.server.request-manager.ts (20 files)	Each item manager now has a static inflight cache instance passed to parent constructor

AndyButland

This is working nicely @madsrasmussen - I don't see any isuses.

I've tested with this setup:

There are 9 unique documents.

I see these requests:

https://localhost:44339/umbraco/management/api/v1/item/document?id=59cdd01f-dc65-486d-84f3-95b8361fcd4f&id=49ac6099-cf51-458b-b9a4-0c1f55dc7902&id=616d0f54-b8b0-450e-be0d-2ca4c06672a2&id=eab72f13-b22e-46d5-b270-9c196e49a53b&id=cdb2bf78-8292-44a3-bff8-5d18aee64078
https://localhost:44339/umbraco/management/api/v1/item/document?id=6374bda9-034a-4109-a837-72ed6a325f11&id=49b422c6-d5b8-486d-8a31-be39345178b2&id=4f0b7052-d854-43b5-bb7c-6c82af4d96d1
https://localhost:44339/umbraco/management/api/v1/item/document?id=cd99be2a-42b8-4dec-94fe-94a3d5d99d64

Which matches up:

Request 1, from property 3 - 5 items requested
Request 2, from property 1 - 3 items requested (Emm, Poormina, Jeavon)
Request 3, from property 2 - 1 item requested (Erica)

In comparison, with main - I see three requests each time for all items from the property.

madsrasmussen · 2026-02-27T07:38:29Z

@AndyButland Thanks for testing. I will merge this so it can be included in 17.3.

Updated [Umbraco.Cms.Persistence.Sqlite](https://github.com/umbraco/Umbraco-CMS) from 17.2.2 to 17.3.0. <details> <summary>Release notes</summary> _Sourced from [Umbraco.Cms.Persistence.Sqlite's releases](https://github.com/umbraco/Umbraco-CMS/releases)._ ## 17.3.0 ## Upgrade Notes In 17.3 we have upgraded our dependency on `MailKit` to 4.15.1. This is a minor version update, but we found a few changes we had to make in core to accommodate changes to nullability constraints. Unless using methods of this library, or it's transitive dependency `MimeKit`, it's unlikely projects will be affected. The update is necessary though, as the version we previously depended on now has a security vulnerability raised against it. We have made a change to how we handle redirects which brings a significant performance improvement for publish time on large sites, when documents with many descendent nodes are published. If you have custom URL providers you should review this change, as there are some [very rare cases](umbraco/Umbraco-CMS#22091 (comment)) where you'll need to adjust to ensure descendent redirects are correctly handled. Note also that we now auto-generate HMAC secret key for new installs. This has been applied to make Umbraco more secure by default, but it's not been forced for upgrades. ## What's Changed Since 17.3.0-rc3 **Full Changelog**: umbraco/Umbraco-CMS@release-17.3.0-rc3...release-17.3.0 ## What's Changed Since 17.3.0-rc2 ### 📦 Dependencies * Dependencies: Update Microsoft packages to latest patch and fix HybridCache ParseFault with Redis by @AndyButland in umbraco/Umbraco-CMS#22278 ### 🐛 Bug Fixes * Examine: Fix DocumentUrlService not initialized during Examine indexing after package upgrade by @AndyButland in umbraco/Umbraco-CMS#22243 * Unattended Upgrades: Rebuild routing caches after background migrations to fix unrouteable document URLs by @AndyButland in umbraco/Umbraco-CMS#22269 * Migrations: Fix NPoco auto-select breaking re-trust FK migration by @AndyButland in umbraco/Umbraco-CMS#22270 **Full Changelog**: umbraco/Umbraco-CMS@release-17.3.0-rc2...release-17.3.0-rc3 ## What's Changed Since 17.3.0-rc1 ### 🐛 Bug Fixes * Migrations: Fix re-trust constraints migration targeting non-Umbraco tables and transaction failure (closes #22227) by @AndyButland in umbraco/Umbraco-CMS#22229 * Distributed Locking: Add ROWLOCK hint to prevent cross-row contention on umbracoLock table (closes #22113) by @AndyButland in umbraco/Umbraco-CMS#22126 * Application URLs: Prevent back office hosts being overwritten in a shared database setup (closes #16741) by @matthewcare in umbraco/Umbraco-CMS#22160 * Migrations: Fix property detection for invariant content types with culture-varying compositions (closes #22159) by @AndyButland in umbraco/Umbraco-CMS#22167 * Migrations: Fix package migrations not running after fresh install with packages (closes #22202) by @AndyButland in umbraco/Umbraco-CMS#22204 **Full Changelog**: umbraco/Umbraco-CMS@release-17.3.0-rc...release-17.3.0-rc2 ## What's Changed Since the Previous Version (17.2.2) ### 🙌 Notable Changes * Templates: Add optional Central Package Management support to UmbracoProject and UmbracoExtension templates by @NguyenThuyLan in umbraco/Umbraco-CMS#21641 * Service registration: Allow running Umbraco with different combinations of backoffice, website and delivery API (closes #21622) by @AndyButland in umbraco/Umbraco-CMS#21630 * Imaging Configuration: Auto-generate HMAC secret key for new installs by @AndyButland in umbraco/Umbraco-CMS#21976 * Migrations: Run unattended upgrades in background, add liveness/readiness health probes (closes #21987) by @AndyButland in umbraco/Umbraco-CMS#22020 ### 💥 Breaking Changes * Dependencies: Update MailKit to 4.15.1 by @AndyButland in umbraco/Umbraco-CMS#22028 ### 📦 Dependencies * Bump lodash from 4.17.21 to 4.17.23 in /tests/Umbraco.Tests.AcceptanceTest in the npm_and_yarn group across 1 directory by @dependabot[bot] in umbraco/Umbraco-CMS#21519 ... (truncated) ## 17.3.0-rc3 ## Upgrade Notes In 17.3 we have upgraded our dependency on `MailKit` to 4.15.1. This is a minor version update, but we found a few changes we had to make in core to accommodate changes to nullability constraints. Unless using methods of this library, or it's transitive dependency `MimeKit`, it's unlikely projects will be affected. The update is necessary though, as the version we previously depended on now has a security vulnerability raised against it. We have made a change to how we handle redirects which brings a significant performance improvement for publish time on large sites, when documents with many descendent nodes are published. If you have custom URL providers you should review this change, as there are some [very rare cases](umbraco/Umbraco-CMS#22091 (comment)) where you'll need to adjust to ensure descendent redirects are correctly handled. Note also that we now auto-generate HMAC secret key for new installs. This has been applied to make Umbraco more secure by default, but it's not been forced for upgrades. ## What's Changed Since 17.3.0-rc2 ### 📦 Dependencies * Dependencies: Update Microsoft packages to latest patch and fix HybridCache ParseFault with Redis by @AndyButland in umbraco/Umbraco-CMS#22278 ### 🐛 Bug Fixes * Examine: Fix DocumentUrlService not initialized during Examine indexing after package upgrade by @AndyButland in umbraco/Umbraco-CMS#22243 * Unattended Upgrades: Rebuild routing caches after background migrations to fix unrouteable document URLs by @AndyButland in umbraco/Umbraco-CMS#22269 * Migrations: Fix NPoco auto-select breaking re-trust FK migration by @AndyButland in umbraco/Umbraco-CMS#22270 **Full Changelog**: umbraco/Umbraco-CMS@release-17.3.0-rc2...release-17.3.0-rc3 ## What's Changed Since 17.3.0-rc1 ### 🐛 Bug Fixes * Migrations: Fix re-trust constraints migration targeting non-Umbraco tables and transaction failure (closes #22227) by @AndyButland in umbraco/Umbraco-CMS#22229 * Distributed Locking: Add ROWLOCK hint to prevent cross-row contention on umbracoLock table (closes #22113) by @AndyButland in umbraco/Umbraco-CMS#22126 * Application URLs: Prevent back office hosts being overwritten in a shared database setup (closes #16741) by @matthewcare in umbraco/Umbraco-CMS#22160 * Migrations: Fix property detection for invariant content types with culture-varying compositions (closes #22159) by @AndyButland in umbraco/Umbraco-CMS#22167 * Migrations: Fix package migrations not running after fresh install with packages (closes #22202) by @AndyButland in umbraco/Umbraco-CMS#22204 **Full Changelog**: umbraco/Umbraco-CMS@release-17.3.0-rc...release-17.3.0-rc2 ## What's Changed Since the Previous Version (17.2.2) ### 🙌 Notable Changes * Templates: Add optional Central Package Management support to UmbracoProject and UmbracoExtension templates by @NguyenThuyLan in umbraco/Umbraco-CMS#21641 * Service registration: Allow running Umbraco with different combinations of backoffice, website and delivery API (closes #21622) by @AndyButland in umbraco/Umbraco-CMS#21630 * Imaging Configuration: Auto-generate HMAC secret key for new installs by @AndyButland in umbraco/Umbraco-CMS#21976 * Migrations: Run unattended upgrades in background, add liveness/readiness health probes (closes #21987) by @AndyButland in umbraco/Umbraco-CMS#22020 ### 💥 Breaking Changes * Dependencies: Update MailKit to 4.15.1 by @AndyButland in umbraco/Umbraco-CMS#22028 ### 📦 Dependencies * Bump lodash from 4.17.21 to 4.17.23 in /tests/Umbraco.Tests.AcceptanceTest in the npm_and_yarn group across 1 directory by @dependabot[bot] in umbraco/Umbraco-CMS#21519 * Bump the npm_and_yarn group across 2 directories with 2 updates by @dependabot[bot] in umbraco/Umbraco-CMS#21754 * Bump qs from 6.14.1 to 6.14.2 in /src/Umbraco.Web.UI.Client in the npm_and_yarn group across 1 directory by @dependabot[bot] in umbraco/Umbraco-CMS#21755 * Dependencies: Bumps @umbraco-ui/uui from 1.17.0 to 1.17.1 by @iOvergaard in umbraco/Umbraco-CMS#22029 * Dependencies: Updates @umbraco-ui/uui to 1.17.2 to fix multiple folder drag-and-drop failing (closes #21837) by @iOvergaard in umbraco/Umbraco-CMS#21886 ... (truncated) ## 17.3.0-rc2 ## Upgrade Notes In 17.3 we have upgraded our dependency on `MailKit` to 4.15.1. This is a minor version update, but we found a few changes we had to make in core to accommodate changes to nullability constraints. Unless using methods of this library, or it's transitive dependency `MimeKit`, it's unlikely projects will be affected. The update is necessary though, as the version we previously depended on now has a security vulnerability raised against it. We have made a change to how we handle redirects which brings a significant performance improvement for publish time on large sites, when documents with many descendent nodes are published. If you have custom URL providers you should review this change, as there are some [very rare cases](umbraco/Umbraco-CMS#22091 (comment)) where you'll need to adjust to ensure descendent redirects are correctly handled. Note also that we now auto-generate HMAC secret key for new installs. This has been applied to make Umbraco more secure by default, but it's not been forced for upgrades. ## What's Changed Since 17.3.0-rc1 ### 🐛 Bug Fixes * Migrations: Fix re-trust constraints migration targeting non-Umbraco tables and transaction failure (closes #22227) by @AndyButland in umbraco/Umbraco-CMS#22229 * Distributed Locking: Add ROWLOCK hint to prevent cross-row contention on umbracoLock table (closes #22113) by @AndyButland in umbraco/Umbraco-CMS#22126 * Application URLs: Prevent back office hosts being overwritten in a shared database setup (closes #16741) by @matthewcare in umbraco/Umbraco-CMS#22160 * Migrations: Fix property detection for invariant content types with culture-varying compositions (closes #22159) by @AndyButland in umbraco/Umbraco-CMS#22167 * Migrations: Fix package migrations not running after fresh install with packages (closes #22202) by @AndyButland in umbraco/Umbraco-CMS#22204 **Full Changelog**: umbraco/Umbraco-CMS@release-17.3.0-rc...release-17.3.0-rc2 ## What's Changed Since the Previous Version (17.2.2) ### 🙌 Notable Changes * Templates: Add optional Central Package Management support to UmbracoProject and UmbracoExtension templates by @NguyenThuyLan in umbraco/Umbraco-CMS#21641 * Service registration: Allow running Umbraco with different combinations of backoffice, website and delivery API (closes #21622) by @AndyButland in umbraco/Umbraco-CMS#21630 * Imaging Configuration: Auto-generate HMAC secret key for new installs by @AndyButland in umbraco/Umbraco-CMS#21976 * Migrations: Run unattended upgrades in background, add liveness/readiness health probes (closes #21987) by @AndyButland in umbraco/Umbraco-CMS#22020 ### 💥 Breaking Changes * Dependencies: Update MailKit to 4.15.1 by @AndyButland in umbraco/Umbraco-CMS#22028 ### 📦 Dependencies * Bump lodash from 4.17.21 to 4.17.23 in /tests/Umbraco.Tests.AcceptanceTest in the npm_and_yarn group across 1 directory by @dependabot[bot] in umbraco/Umbraco-CMS#21519 * Bump the npm_and_yarn group across 2 directories with 2 updates by @dependabot[bot] in umbraco/Umbraco-CMS#21754 * Bump qs from 6.14.1 to 6.14.2 in /src/Umbraco.Web.UI.Client in the npm_and_yarn group across 1 directory by @dependabot[bot] in umbraco/Umbraco-CMS#21755 * Dependencies: Bumps @umbraco-ui/uui from 1.17.0 to 1.17.1 by @iOvergaard in umbraco/Umbraco-CMS#22029 * Dependencies: Updates @umbraco-ui/uui to 1.17.2 to fix multiple folder drag-and-drop failing (closes #21837) by @iOvergaard in umbraco/Umbraco-CMS#21886 * Backoffice: Update vite from 7.1.11 to 7.3.1 by @iOvergaard in umbraco/Umbraco-CMS#22065 * Dependencies: Update server-side dependencies to latest patch or minor releases by @AndyButland in umbraco/Umbraco-CMS#21860 ### 🚤 Performance * Performance: Implement key-based caching for data type and template repositories by @AndyButland in umbraco/Umbraco-CMS#21280 * Management API: Optimize collection view performance by eliminating N+1 patterns by @AndyButland in umbraco/Umbraco-CMS#21684 * Performance: Optimize handling of content type updates by @kjac in umbraco/Umbraco-CMS#21910 * Backoffice Performance: Add inflight request deduplication to item data request managers by @madsrasmussen in umbraco/Umbraco-CMS#21767 * URL and Alias Caches: Optimize for invariant documents by @AndyButland in umbraco/Umbraco-CMS#21558 * Custom Views: Prevent re-rendering Block Views and Properties by @rickbutterfield in umbraco/Umbraco-CMS#21186 * Core: Minimize await to a single JS cycle (refactor #21186) by @nielslyngsoe in umbraco/Umbraco-CMS#22074 * Auth: Skip /token refresh when access token is still valid by @iOvergaard in umbraco/Umbraco-CMS#22087 * Memory Management: Dispose `IDisposable` resources correctly in four internal classes by @AndyButland in umbraco/Umbraco-CMS#22014 * Redirect Tracking: Fix segment change detection and optimise descendant traversal (closes #22082) by @AndyButland in umbraco/Umbraco-CMS#22091 ... (truncated) ## 17.3.0-rc ## Upgrade Notes In 17.3 we have upgraded our dependency on `MailKit` to 4.15.1. This is a minor version update, but we found a few changes we had to make in core to accommodate changes to nullability constraints. Unless using methods of this library, or it's transitive dependency `MimeKit`, it's unlikely projects will be affected. The update is necessary though, as the version we previously depended on now has a security vulnerability raised against it. We have made a change to how we handle redirects which brings a significant performance improvement for publish time on large sites, when documents with many descendent nodes are published. If you have custom URL providers you should review this change, as there are some [very rare cases](umbraco/Umbraco-CMS#22091 (comment)) where you'll need to adjust to ensure descendent redirects are correctly handled. Note also that we now auto-generate HMAC secret key for new installs. This has been applied to make Umbraco more secure by default, but it's not been forced for upgrades. ## What's Changed ### 🙌 Notable Changes * Templates: Add optional Central Package Management support to UmbracoProject and UmbracoExtension templates by @NguyenThuyLan in umbraco/Umbraco-CMS#21641 * Service registration: Allow running Umbraco with different combinations of backoffice, website and delivery API (closes #21622) by @AndyButland in umbraco/Umbraco-CMS#21630 * Imaging Configuration: Auto-generate HMAC secret key for new installs by @AndyButland in umbraco/Umbraco-CMS#21976 * Migrations: Run unattended upgrades in background, add liveness/readiness health probes (closes #21987) by @AndyButland in umbraco/Umbraco-CMS#22020 ### 💥 Breaking Changes * Dependencies: Update MailKit to 4.15.1 by @AndyButland in umbraco/Umbraco-CMS#22028 ### 📦 Dependencies * Bump lodash from 4.17.21 to 4.17.23 in /tests/Umbraco.Tests.AcceptanceTest in the npm_and_yarn group across 1 directory by @dependabot[bot] in umbraco/Umbraco-CMS#21519 * Bump the npm_and_yarn group across 2 directories with 2 updates by @dependabot[bot] in umbraco/Umbraco-CMS#21754 * Bump qs from 6.14.1 to 6.14.2 in /src/Umbraco.Web.UI.Client in the npm_and_yarn group across 1 directory by @dependabot[bot] in umbraco/Umbraco-CMS#21755 * Dependencies: Bumps @umbraco-ui/uui from 1.17.0 to 1.17.1 by @iOvergaard in umbraco/Umbraco-CMS#22029 * Dependencies: Updates @umbraco-ui/uui to 1.17.2 to fix multiple folder drag-and-drop failing (closes #21837) by @iOvergaard in umbraco/Umbraco-CMS#21886 * Backoffice: Update vite from 7.1.11 to 7.3.1 by @iOvergaard in umbraco/Umbraco-CMS#22065 * Dependencies: Update server-side dependencies to latest patch or minor releases by @AndyButland in umbraco/Umbraco-CMS#21860 ### 🚤 Performance * Performance: Implement key-based caching for data type and template repositories by @AndyButland in umbraco/Umbraco-CMS#21280 * Management API: Optimize collection view performance by eliminating N+1 patterns by @AndyButland in umbraco/Umbraco-CMS#21684 * Performance: Optimize handling of content type updates by @kjac in umbraco/Umbraco-CMS#21910 * Backoffice Performance: Add inflight request deduplication to item data request managers by @madsrasmussen in umbraco/Umbraco-CMS#21767 * URL and Alias Caches: Optimize for invariant documents by @AndyButland in umbraco/Umbraco-CMS#21558 * Custom Views: Prevent re-rendering Block Views and Properties by @rickbutterfield in umbraco/Umbraco-CMS#21186 * Core: Minimize await to a single JS cycle (refactor #21186) by @nielslyngsoe in umbraco/Umbraco-CMS#22074 * Auth: Skip /token refresh when access token is still valid by @iOvergaard in umbraco/Umbraco-CMS#22087 * Memory Management: Dispose `IDisposable` resources correctly in four internal classes by @AndyButland in umbraco/Umbraco-CMS#22014 * Redirect Tracking: Fix segment change detection and optimise descendant traversal (closes #22082) by @AndyButland in umbraco/Umbraco-CMS#22091 ### 🌈 Accessibility Improvements * Entity Actions: Adds a descriptive title to the first action so you know what it does by @iOvergaard in umbraco/Umbraco-CMS#21739 * Search field: Added aria-label and name to search input for accessibility (closes #21938) by @andreaslborg in umbraco/Umbraco-CMS#21962 * List view: Added labels entity bulk action buttons by @andreaslborg in umbraco/Umbraco-CMS#21964 * Accessibility: Add title attributes to buttons in block list entry and property editor UI by @manutdkid77 in umbraco/Umbraco-CMS#21842 * Accessibility: Add tooltips to block grid entry actions by @manutdkid77 in umbraco/Umbraco-CMS#21958 * Accessibility: Added `title` attribute for icon in content types by @TechPdo in umbraco/Umbraco-CMS#21956 ### 🚀 New Features ... (truncated) Commits viewable in [compare view](umbraco/Umbraco-CMS@release-17.2.2...release-17.3.0). </details> [![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=Umbraco.Cms.Persistence.Sqlite&package-manager=nuget&previous-version=17.2.2&new-version=17.3.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. 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madsrasmussen added 3 commits February 16, 2026 12:51

add inflight request cache to all item request managers

8982ad4

Use inflight request cache for item data

c5f0cae

Add tests for Item Data Request Manager

1226c03

Copilot AI review requested due to automatic review settings February 16, 2026 12:31

madsrasmussen added area/frontend category/performance Fixes for performance (generally cpu or memory) fixes labels Feb 16, 2026

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Merge branch 'main' into v17/improvement/items-inflight-request-cache

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madsrasmussen requested a review from AndyButland February 26, 2026 12:26

AndyButland approved these changes Feb 26, 2026

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madsrasmussen merged commit 6f2cd9e into main Feb 27, 2026
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madsrasmussen deleted the v17/improvement/items-inflight-request-cache branch February 27, 2026 07:38

madsrasmussen added the release/17.3.0 label Feb 27, 2026

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Backoffice Performance: Add inflight request deduplication to item data request managers#21767

Backoffice Performance: Add inflight request deduplication to item data request managers#21767
madsrasmussen merged 4 commits intomainfrom
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