perf: recalculate getOrderedReportIDs only on web and desktop

[hurali97]

Details

This change limits re-calculating getOrderedReportIDs on mobile. Which means that this will only be called on web and desktop. Consider a case, where we open a report with expenses, when we click on a expense a new LHN item is added in the LHN list and we are navigated to that new item, when we navigate back OR away from that new item it is then gone. Whereas on mobile, we are just navigated to the next screen with expense details, so there's no LHN being visible, so there seems no point in re-calculating this expensive function on mobile.

Before:

After:

So if we average out before it is 118.28ms and after is 44.8ms, so we save around 60% for the case described above.

Fixed Issues

$ #46291
PROPOSAL:

Tests

• Verify that no errors appear in the JS console

Offline tests

QA Steps

• Verify that no errors appear in the JS console

PR Author Checklist

• I linked the correct issue in the ### Fixed Issues section above
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  • Android: Native
  • Android: mWeb Chrome
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Screenshots/Videos

Android: Native

android.mov

Android: mWeb Chrome

android-web.mov

iOS: Native

iOS: mWeb Safari

MacOS: Chrome / Safari

web.mov

MacOS: Desktop

desktop.mov

[melvin-bot]

@c3024 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]

[c3024]

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 tests pass on all platforms & I tested again on:
  • Android: Native
  • Android: mWeb Chrome
  • iOS: Native
  • iOS: mWeb Safari
  • MacOS: Chrome / Safari
  • MacOS: Desktop
• 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
• I verified proper code patterns were followed (see Reviewing the code)
  • I verified that any callback methods that were added or modified are named for what the method does and never what callback they handle (i.e. toggleReport and not onIconClick).
  • I verified that the left part of a conditional rendering a React component is a boolean and NOT a string, e.g. myBool && <MyComponent />.
  • 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
• I verified that this PR follows the guidelines as stated in the Review Guidelines
• I verified other components that can be impacted by these changes have been tested, and I retested again (i.e. if the PR modifies a shared library or component like Avatar, I verified the components using Avatar have been tested & I retested again)
• I verified all code is DRY (the PR doesn't include any logic written more than once, with the exception of tests)
• I verified any variables that can be defined as constants (ie. in CONST.js or at the top of the file that uses the constant) are defined as such
• If a new component is created I verified that:
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  • Any internal methods bound to this are necessary to be bound (i.e. avoid this.submit = this.submit.bind(this); if this.submit is never passed to a component event handler like onClick)
  • All JSX used for rendering exists in the render method
  • The component has the minimum amount of code necessary for its purpose, and it is broken down into smaller components in order to separate concerns and functions
• If any new file was added I verified that:
  • 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
• If a new CSS style is added I verified that:
  • A similar style doesn't already exist
  • The style can't be created with an existing StyleUtils function (i.e. StyleUtils.getBackgroundAndBorderStyle(theme.componentBG)
• If the PR modifies code that runs when editing or sending messages, I tested and verified there is no unexpected behavior for all supported markdown - URLs, single line code, code blocks, quotes, headings, bold, strikethrough, and italic.
• If the PR modifies a generic component, I tested and verified that those changes do not break usages of that component in the rest of the App (i.e. if a shared library or component like Avatar is modified, I verified that Avatar is working as expected in all cases)
• If the PR modifies a component related to any of the existing Storybook stories, I tested and verified all stories for that component are still working as expected.
• 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.
• 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.
• I have checked off every checkbox in the PR reviewer checklist, including those that don't apply to this PR.

Screenshots/Videos

Android: Native

useReportIDsAndroid.mp4

Android: mWeb Chrome

useReportIDsAndroidmWeb.mp4

iOS: Native

useReportIDsiOS.mp4

iOS: mWeb Safari

useReportIDsiOSmWeb.mp4

MacOS: Chrome / Safari

useReportIDsChrome.mp4

useReportIDsChrome1.mp4

MacOS: Desktop

useReportIDsDesktop.mp4

[c3024]

LGTM!

[melvin-bot]

We did not find an internal engineer to review this PR, trying to assign a random engineer to #46291 as well as to this PR... Please reach out for help on Slack if no one gets assigned!

[dangrous]

Seems worth a shot! I have two quick questions but approved:

• Why do we need to also run this if orderedReportIDs is empty?
• shouldUseNarrowLayout would also be true if the web / desktop windows are narrow enough (I think) - do we need to worry about the case where someone hits this code and then makes the window bigger? Seems relatively uncommon but possible

[hurali97]

shouldUseNarrowLayout would also be true if the web / desktop windows are narrow enough (I think) - do we need to worry about the case where someone hits this code and then makes the window bigger? Seems relatively uncommon but possible

@dangrous Good point. However, I think this won't be an issue. The reason is that we are mostly trying to improve the performance on mobile devices, so it means mobile web or mobile app. The layout there only shows one screen or one part of UI at a time. If some user narrows the layout on desktop this getOrderedReportIDs won't be called, for eg when opening an expense from report actions. But when he makes his window bigger, this getOrderedReportIDs will be called if he opens the expense again. We don't worry about this because on web and desktop we have much powerful resources and also, it is the desired behaviour on these platforms because we show the Expense details in a new item in the LHN, which can only happen if we re-calculate the getOrderedReportIDs.

[dangrous]

Okay cool, yeah I think this is worth merging, and will do so (after writing this comment).

I do want to call out for the future, after the discussion above, the edge case - which is not worth blocking at the moment - where:

• User opens an expense in narrow view on desktop web
• User expands the window enough to see the LHN
• Expense will not be visible in LHN unless they navigate away and back

So if we can figure out a way to fix that as a follow up maybe?

[OSBotify]

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

[c3024]

@dangrous

I see the expense showing up on LHN here on expanding the window.

enlargeScreen1.mp4

enlargeScreen2.mp4

When we expand the window to a size above mobile size shouldUseNarrowLayout changes and the useMemo hook runs again. So, the current report (expense report) shows up in LHN, right?

[adhorodyski]

Backlinking to #45528

[dangrous]

ooh okay i misunderstood the flow then - if that works then I think we're good!

[OSBotify]

🚀 Deployed to staging by https://github.com/dangrous in version: 9.0.15-0 🚀

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

[OSBotify]

🚀 Deployed to production by https://github.com/roryabraham in version: 9.0.15-9 🚀

platform	result
🤖 android 🤖	failure ❌
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅