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Optimize post-expense search page transition with progressive rendering#86738

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luacmartins merged 17 commits intoExpensify:mainfrom
software-mansion-labs:korytko/perf/destination-visible
Apr 2, 2026
Merged

Optimize post-expense search page transition with progressive rendering#86738
luacmartins merged 17 commits intoExpensify:mainfrom
software-mansion-labs:korytko/perf/destination-visible

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@JakubKorytko JakubKorytko commented Mar 31, 2026

Explanation of Change

Optimizes the post-expense-creation search page transition on narrow (mobile) layouts. Instead of waiting for the heavy Search component to mount, we show lightweight static stand-ins and progressively upgrade to the full interactive UI.

Rendering phases (submit-and-navigate flow only):

Phase Trigger List area Chrome (tabs, header, filters) Interactive?
1 - Static list Navigation lands SearchStaticList renders real data via plain FlatList (max 10 items) Static pulsing stand-ins (StaticTabSelector, StaticSearchPageHeader, StaticFiltersBar) Rows are tappable
2 - Header interactive SearchStaticList.onLayout fires Still SearchStaticList (unchanged) Pulsing stops, real chrome components mount Header interactive, list rows tappable
3 - Search replaces static useEffect sets isInteractive=true via startTransition Search mounts and receives staticListContent as initialContent prop - renders same static content on first frame while hooks initialize Real chrome Header interactive
4 - Fully interactive Search finishes deferred work (shouldShowRowSkeleton clears) Full FlashList replaces initialContent Real chrome Yes (everything)

Key design: there is no overlay. SearchStaticList is rendered alone first, then replaced by Search which receives the same staticListContent element as initialContent. This avoids having two list components mounted simultaneously, preventing UI thread contention.

Other changes:

  • skipWaitForWrites -- fires the search API immediately when a deferred write is pending (no risk of overwriting optimistic data since search snapshots live in separate Onyx keys)
  • Synchronous navigation in handleNavigateAfterExpenseCreate when navigationRef is already ready
  • Cached optimistic item index so re-injection preserves sorted position instead of appending to the end
  • PulsingView -- reusable Reanimated component for opacity pulse animation with wrapperStyle prop for opaque backgrounds that shouldn't pulse
  • skipSkeleton prop on SearchInputSelectionWrapper to avoid double-skeleton on the static path
  • SearchStaticList uses useSession() context instead of useCurrentUserPersonalDetails() to avoid extra Onyx subscriptions
  • Single PulsingView wrapper around all static header components

Performance gains (ManualSubmitToDestinationVisible span):

Platform main avg (ms) This branch avg (ms) Improvement
Android 1212 615 -597 ms (49%)
iOS 1736 1118 -618 ms (36%)
Raw measurements (the first one is cold)
  • Android main (6 runs): 1684, 1079, 1085, 1095, 1079, 1249 ms
  • Android this branch (6 runs): 617, 628, 579, 575, 604, 686 ms
  • iOS main (5 runs): 1804, 1758, 1590, 1863, 1664 ms
  • iOS this branch (5 runs): 904, 1083, 1332, 1129, 1143 ms

Fixed Issues

$ #83634
PROPOSAL: N/A

Tests

  1. Open the app on a narrow-layout device (or resize the browser to mobile width)
  2. Navigate to the expense creation flow (e.g. tap + -> Submit expense), fill in the required fields, and submit
  3. Verify that after submission you are taken to the Search page and a static list of search results with pulsing tab selector, header, and filters bar appears almost instantly (no blank screen or long skeleton)
  4. Wait a moment for the full interactive Search component to mount
  5. Verify that the pulsing animation stops and the page becomes fully interactive (tabs are tappable, filters work, search input is focusable)

Offline tests

  1. Submit an expense while offline (airplane mode / network disabled)
  2. Verify the search page still shows a pulsing skeleton placeholder for the pending expense
  3. Re-enable the network and verify the optimistic expense resolves into the real search list once the API responds

QA Steps

  1. On staging, open the app on a mobile device or narrow browser viewport
  2. Submit an expense and verify the transition to the Search page is fast with the static list and pulsing chrome visible immediately
  3. Verify that after the full interactive components load, all search functionality works correctly (tabs, filters, search input, tapping on expense rows)

PR Author Checklist

  • I linked the correct issue in the ### Fixed Issues section above
  • I wrote clear testing steps that cover the changes made in this PR
    • I added steps for local testing in the Tests section
    • I added steps for the expected offline behavior in the Offline steps section
    • I added steps for Staging and/or Production testing in the QA steps section
    • I added steps to cover 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 tested this PR with a High Traffic account against the staging or production API to ensure there are no regressions (e.g. long loading states that impact usability).
  • I included screenshots or videos for tests on all platforms
  • I ran the tests on all platforms & verified they passed on:
    • Android: Native
    • Android: mWeb Chrome
    • iOS: Native
    • iOS: mWeb Safari
    • MacOS: Chrome / Safari
  • I verified there are no console errors (if there's a console error not related to the PR, report it or open an issue for it to be fixed)
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      • If any non-english text was added/modified, I used JaimeGPT to get English > Spanish translation. I then posted it in #expensify-open-source and it was approved by an internal Expensify engineer. Link to Slack message:
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    • 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)
    • I verified proper file naming conventions were followed for any new files or renamed files. All non-platform specific files are named after what they export and are not named "index.js". All platform-specific files are named for the platform the code supports as outlined in the README.
    • I verified the JSDocs style guidelines (in STYLE.md) were followed
  • If a new code pattern is added I verified it was agreed to be used by multiple Expensify engineers
  • I followed the guidelines as stated in the Review Guidelines
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    • The file has a description of what it does and/or why is needed at the top of the file if the code is not self explanatory
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    • A similar style doesn't already exist
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  • If the PR modifies a component or page that can be accessed by a direct deeplink, I verified that the code functions as expected when the deeplink is used - from a logged in and logged out account.
  • If the PR modifies the UI (e.g. new buttons, new UI components, changing the padding/spacing/sizing, moving components, etc) or modifies the form input styles:
    • I verified that all the inputs inside a form are aligned with each other.
    • I added Design label and/or tagged @Expensify/design so the design team can review the changes.
  • If a new page is added, I verified it's using the ScrollView component to make it scrollable when more elements are added to the page.
  • I added unit tests for any new feature or bug fix in this PR to help automatically prevent regressions in this user flow.
  • If the main branch was merged into this PR after a review, I tested again and verified the outcome was still expected according to the Test steps.

Screenshots/Videos

Android: Native
Android_new.mov
Android: mWeb Chrome
iOS: Native
iOS_new.mov
iOS: mWeb Safari
MacOS: Chrome / Safari

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codecov bot commented Mar 31, 2026


function SearchInputSelectionWrapper({ref, ...props}: SearchAutocompleteInputProps) {
const [showSkeleton, setShowSkeleton] = useState(!isAutocompleteInputInitialized);
function SearchInputSelectionWrapper({ref, skipSkeleton, ...props}: SearchAutocompleteInputProps & {skipSkeleton?: boolean}) {
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Can skipSkeleton be a part of SearchAutocompleteInputProps?

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Unfortunately no - SearchAutocompleteInput itself doesn't use skipSkeleton, so adding it to SearchAutocompleteInputProps triggers react/no-unused-prop-types. It's only consumed by the wrapper layer, so the intersection type is the correct approach here.

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@JakubKorytko JakubKorytko marked this pull request as ready for review April 1, 2026 12:46
@JakubKorytko JakubKorytko requested review from a team as code owners April 1, 2026 12:46
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melvin-bot bot commented Apr 1, 2026

@ShridharGoel 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]

@melvin-bot melvin-bot bot removed request for a team April 1, 2026 12:46
@JakubKorytko JakubKorytko requested a review from staszekscp April 1, 2026 12:52
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@codex review

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TypeScript failing on main - unrelated.

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Codex Review: Didn't find any major issues. Keep it up!

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No product review needed

@joekaufmanexpensify joekaufmanexpensify removed their request for review April 1, 2026 19:49
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ShridharGoel commented Apr 1, 2026

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
    • I verified the steps for Staging and/or Production testing are in the QA steps section
    • 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
  • I verified that the composer does not automatically focus or open the keyboard on mobile unless explicitly intended. This includes checking that returning the app from the background does not unexpectedly open the keyboard.
  • I verified tests pass on all platforms & I tested again on:
    • Android: HybridApp
    • Android: mWeb Chrome
    • iOS: HybridApp
    • iOS: mWeb Safari
    • MacOS: Chrome / Safari
  • If there are any errors in the console that are unrelated to this PR, I either fixed them (preferred) or linked to where I reported them in Slack
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    • I verified that comments were added to code that is not self explanatory
    • I verified that any new or modified comments were clear, correct English, and explained "why" the code was doing something instead of only explaining "what" the code was doing.
    • 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)
    • I verified proper file naming conventions were followed for any new files or renamed files. All non-platform specific files are named after what they export and are not named "index.js". All platform-specific files are named for the platform the code supports as outlined in the README.
    • I verified the JSDocs style guidelines (in STYLE.md) were followed
  • If a new code pattern is added I verified it was agreed to be used by multiple Expensify engineers
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Screenshots/Videos

Android: HybridApp
Screen.Recording.2026-04-02.at.10.05.23.PM.mov
Android: mWeb Chrome
Screen.Recording.2026-04-02.at.10.09.03.PM.mov
iOS: HybridApp
iOS: mWeb Safari
Screen.Recording.2026-04-02.at.3.09.51.AM.mov
MacOS: Chrome / Safari

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Can people have a look at the offline experience? It is a bit unstable I guess (might not be related to the changes here though)

Screen.Recording.2026-04-02.at.3.09.51.AM.mov

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JakubKorytko commented Apr 2, 2026

@ShridharGoel Next time, please try to provide the minimum number of steps necessary to reproduce the issue, as the video is quite long and it will make it easier for QA's in future. 🙏 The offline + no Onyx issue is reproducible on main, though I agree it's something to look into but out of scope here.

Repro steps:

  1. Go to Troubleshoot page
  2. Clear the Onyx cache
  3. Turn on the offline mode
  4. Add an expense outside of the Inbox

Video from main:

Screen.Recording.2026-04-02.at.09.21.49.mov

About the headers, I can't seem to reproduce neither on main or my branch 😕 Can you reliably reproduce this?

@luacmartins luacmartins self-requested a review April 2, 2026 14:25
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Discussed over Slack, we can ignore this since it is happening on main also

@melvin-bot melvin-bot bot requested a review from mountiny April 2, 2026 16:40
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I'm slightly concerned with the maintainability of this architecture and the potential class of bugs it might introduce. I think we should revisit this solution once the tab navigation changes are in.

@luacmartins luacmartins merged commit b308830 into Expensify:main Apr 2, 2026
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OSBotify commented Apr 2, 2026

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

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github-actions bot commented Apr 2, 2026

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

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OSBotify commented Apr 2, 2026

🚀 Deployed to staging by https://github.com/luacmartins in version: 9.3.52-0 🚀

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

Bundle Size Analysis (Sentry):

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No help site changes are required.

This PR is a performance optimization for the search page transition after expense creation on narrow layouts. It introduces progressive rendering (static placeholders → full interactive UI) to reduce load time by ~36-49%.

The changes are entirely internal:

  • New internal components (PulsingView, SearchStaticList, static header stand-ins)
  • Rendering strategy changes (progressive mounting, skipWaitForWrites, synchronous navigation)
  • No new user-facing features, settings, or workflows
  • No changed button labels, tab names, or UI terminology
  • No changed user flows — the same actions produce the same results, just faster

The help site documents user-facing features and workflows, none of which are affected by this PR.

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OSBotify commented Apr 7, 2026

🚀 Deployed to production by https://github.com/roryabraham in version: 9.3.52-9 🚀

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

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7 participants