Fix freeze when opening "Add approval workflow" on workspaces with many members by TMisiukiewicz · Pull Request #89268 · Expensify/App

TMisiukiewicz · 2026-04-30T13:25:31Z

Explanation of Change

getMemberAccountIDsForWorkspace(policy?.employeeList) was being called inside two separate .map() callbacks — one inside a useEffect and one in the availableMembers map. This function iterates the entire workspace employeeList and performs a personal-detail lookup per email, so calling it inside a .map() over the same list created O(N²) work. On a workspace with a few hundred members, pressing "Add approval workflow" froze the app for roughly a minute.

The fix hoists the call to the component body so it runs once per render instead of once per member. React Compiler memoizes it automatically — no useMemo needed (and per project coding rules, useMemo/useCallback/React.memo are forbidden). No behavior change: same data, just computed once instead of N times.

Fixed Issues

$ #89270
PROPOSAL:

Tests

Create a workspace
Go to Workflows
Enable Approvals
Press Add approval workflow
Verify the form with members opens correctly

Verify that no errors appear in the JS console

Offline tests

N/A

QA Steps

Same as tests

Verify that no errors appear in the JS console

PR Author Checklist

Screenshots/Videos

Android: Native

Android: mWeb Chrome

iOS: Native

iOS: mWeb Safari

MacOS: Chrome / Safari

…²) freeze

melvin-bot · 2026-04-30T13:27:07Z

@abzokhattab Please copy/paste the Reviewer Checklist from here into a new comment on this PR and complete it. If you have the K2 extension, you can simply click: [this button]

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codecov · 2026-04-30T13:37:14Z

Codecov Report

✅ Changes either increased or maintained existing code coverage, great job!

Files with missing lines	Coverage Δ
...ls/WorkspaceWorkflowsApprovalsExpensesFromPage.tsx	`0.00% <0.00%> (ø)`
... and 9 files with indirect coverage changes

JS00001

Thanks for fixing this!

Copilot

Pull request overview

This PR addresses a performance issue in the workspace approvals workflow UI where opening “Add approval workflow” could freeze on large workspaces due to repeated full-employee-list processing.

Changes:

Hoists getMemberAccountIDsForWorkspace(policy?.employeeList) so it’s computed once per render instead of once per member.
Reuses the computed email→accountID map in both the useEffect selected-members sync and the availableMembers construction.

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            }),
        );
-    }, [approvalWorkflow?.members, policy?.employeeList, policy?.owner, translate, icons.FallbackAvatar]);
+    }, [approvalWorkflow?.members, policy?.employeeList, policy?.owner, policyMemberEmailsToAccountIDs, translate, icons.FallbackAvatar]);


mountiny · 2026-04-30T13:45:21Z

@MelvinBot can you please create a dedicated issue for this pull request and assign @mountiny and @TMisiukiewicz and @abzokhattab. Make it with Daily, Bug, Reviewing labels

MelvinBot · 2026-04-30T13:47:32Z

Created dedicated issue: #89270

Assigned to mountiny, TMisiukiewicz, and abzokhattab with Daily, Bug, and Reviewing labels.

abzokhattab · 2026-04-30T15:15:56Z

Reviewer Checklist

I have verified the author checklist is complete (all boxes are checked off).
I verified the correct issue is linked in the ### Fixed Issues section above
I verified testing steps are clear and they cover the changes made in this PR
- I verified the steps for local testing are in the Tests section
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- I verified the steps cover any possible failure scenarios (i.e. verify an input displays the correct error message if the entered data is not correct)
- I turned off my network connection and tested it while offline to ensure it matches the expected behavior (i.e. verify the default avatar icon is displayed if app is offline)
I checked that screenshots or videos are included for tests on all platforms
I included screenshots or videos for tests on all platforms
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I verified tests pass on all platforms & I tested again on:
- Android: HybridApp
- Android: mWeb Chrome
- iOS: HybridApp
- iOS: mWeb Safari
- MacOS: Chrome / Safari
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- I verified any copy / text shown in the product is localized by adding it to src/languages/* files and using the translation method
- I verified all numbers, amounts, dates and phone numbers shown in the product are using the localization methods
- I verified any copy / text that was added to the app is grammatically correct in English. It adheres to proper capitalization guidelines (note: only the first word of header/labels should be capitalized), and is either coming verbatim from figma or has been approved by marketing (in order to get marketing approval, ask the Bug Zero team member to add the Waiting for copy label to the issue)
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If any new file was added I verified that:
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Screenshots/Videos

Android: HybridApp

Screen.Recording.2026-04-30.at.18.11.27.mov

Android: mWeb Chrome

Screen.Recording.2026-04-30.at.18.12.17.mov

iOS: HybridApp

Screen.Recording.2026-04-30.at.18.11.27.mov

iOS: mWeb Safari

Screen.Recording.2026-04-30.at.18.12.17.mov

MacOS: Chrome / Safari

Screen.Recording.2026-04-30.at.18.10.20.mov

abzokhattab

LGTM 🚀🚀

mountiny

Thanks

github-actions · 2026-05-01T06:24:39Z

🚧 @mountiny has triggered a test Expensify/App build. You can view the workflow run here.

github-actions · 2026-05-01T06:28:46Z

🧪🧪 Use the links below to test this adhoc build on Android, iOS, and Web. Happy testing! 🧪🧪
Built from App PR #89268.

Android 🤖	iOS 🍎
https://ad-hoc-expensify-cash.s3.us-east-1.amazonaws.com/rock-artifacts/ad-hoc/rock-android-Adhoc-dc8e2eb-d62f513-57ab8a71d1d0a27d243b385a5b0e94925b04d6b2/index.html	https://ad-hoc-expensify-cash.s3.us-east-1.amazonaws.com/rock-artifacts/ad-hoc/rock-ios-device-AdHoc-dc8e2eb-d62f513-8d895a4a06ab1dcf256ac42f2fb2eba27f1aeb47/index.html

Web 🕸️
https://89268.pr-testing.expensify.com

👀 View the workflow run that generated this build 👀

OSBotify · 2026-05-01T06:31:17Z

✋ This PR was not deployed to staging yet because QA is ongoing. It will be automatically deployed to staging after the next production release.

OSBotify · 2026-05-04T13:28:41Z

🚀 Deployed to staging by https://github.com/mountiny in version: 9.3.66-0 🚀

platform	result
🕸 web 🕸	success ✅
🤖 android 🤖	cancelled 🔪
🍎 iOS 🍎	cancelled 🔪

MelvinBot · 2026-05-04T13:30:04Z

No help site changes are needed for this PR. It's a performance optimization that hoists getMemberAccountIDsForWorkspace out of .map() callbacks to eliminate O(N²) work — no user-facing behavior, UI, or workflow changes.

Hoist getMemberAccountIDsForWorkspace out of map callbacks to fix O(N…

b7eeaa8

…²) freeze

melvin-bot Bot assigned TMisiukiewicz Apr 30, 2026

TMisiukiewicz changed the title ~~[No QA] Fix freeze when opening "Add approval workflow" on workspaces with many members~~ Fix freeze when opening "Add approval workflow" on workspaces with many members Apr 30, 2026

TMisiukiewicz marked this pull request as ready for review April 30, 2026 13:26

TMisiukiewicz requested review from a team as code owners April 30, 2026 13:27

melvin-bot Bot requested review from JmillsExpensify and abzokhattab and removed request for a team April 30, 2026 13:27

melvin-bot Bot removed the request for review from a team April 30, 2026 13:27

adhorodyski approved these changes Apr 30, 2026

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chatgpt-codex-connector Bot reviewed Apr 30, 2026

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Comment thread src/pages/workspace/workflows/approvals/WorkspaceWorkflowsApprovalsExpensesFromPage.tsx

mountiny requested review from Copilot and mountiny April 30, 2026 13:39

JS00001 approved these changes Apr 30, 2026

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Copilot started reviewing on behalf of mountiny April 30, 2026 13:39 View session

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MelvinBot mentioned this pull request Apr 30, 2026

[$250] Fix freeze when opening "Add approval workflow" on workspaces with many members #89270

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abzokhattab approved these changes Apr 30, 2026

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mountiny approved these changes May 1, 2026

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mountiny merged commit dc8e2eb into Expensify:main May 1, 2026
73 of 78 checks passed

OSBotify mentioned this pull request May 4, 2026

Deploy Checklist: New Expensify 2026-05-04 #89508

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TMisiukiewicz commented Apr 30, 2026 •

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