Fix rendering TransactionListItemRow

[jnowakow]

Details

Recent PR wrapped all components used in TransactionListItemRow in memo. As only keyForList was used in arePropsEqual it prevented those rows to update when transaction changed. It seems that memo isn't required at all in this case as those components aren't re-rendered frequently even during scroll.

Fixed Issues

$ #42774
PROPOSAL: N/A

Tests

1. Open New Search Page
2. Quickly scroll through list
3. Ensure that scroll doesn't lag.

• Verify that no errors appear in the JS console

Offline tests

N/A

QA Steps

Same as in Tests

• Verify that no errors appear in the JS console

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
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  • Android: Native
  • Android: mWeb Chrome
  • iOS: Native
  • iOS: mWeb Safari
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Screenshots/Videos

Android: Native

search-android.mov

Android: mWeb Chrome

See comment

iOS: Native

search-ios.mov

iOS: mWeb Safari

search-ios-web.mov

MacOS: Chrome / Safari

search-web.mov

MacOS: Desktop

search-desktop.mov

[melvin-bot]

@allroundexperts 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]

[Kicu]

Looks good 👍 and makes sense to me. I agree with @jnowakow that if we want Live updates to work then the components have to react to any prop changing, as a change of any prop can now come at anytime.

Also when I actually tested how often the TransactionItem re-renders I noticed that they do NOT render on every scroll. There is quite a lot of re-renderes when new data is fetched via lazy loading - but that is expected.

To me removing memo for now makes sense. I don't think it makes that big of a difference

[luacmartins]

Won't remove memo and keyForList re-introduce the performance issue we had with Search on native devices?

[Kicu]

if memo reacts only to one prop called keyForList then the whole list of items will never update while they are displayed, because they would not re-render.
I guess one solution would be to use memo without the second param, so that it does shallow equal on all component props. But Im not sure if thats really worth it.
Someone should measure this. But both me and @jnowakow noticed: these components do not really re-render while scrolling. React.memo prevents too many re-renders. So in this case Im not sure if its that useful.

[jnowakow]

Won't remove memo and keyForList re-introduce the performance issue we had with Search on native devices?

I don't think it will as the memo wasn't very useful in this case. Performance problems with lists are caused by first render of the row. It was improved by introducing window. Thanks to it the rows are rendered off screen. memo doesn't improves the time of first render, it prevents already rendered components to re-render. Our cells aren't re-rendered when user scrolls through list. Moreover it should be used only with components that have some heavy logic because it may be performance bottle neck. Our cells don't have almost any logic so we do not benefit from using memo on those components. This means that poor performance on mobile has different cause.

I would go forward with this PR as it blocks the Onyx one. In the meantime I can check what causes the performance problems on Android

[luacmartins]

Ah that makes sense! Thanks for clarifying. I agree this is not a blocker then.

[luacmartins]

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)
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  • 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.
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Screenshots/Videos

Android: Native

Android: mWeb Chrome

iOS: Native

iOS: mWeb Safari

MacOS: Chrome / Safari

MacOS: Desktop

[OSBotify]

🚀 Deployed to production by https://github.com/Julesssss in version: 1.4.79-11 🚀

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

[charles-liang]

@jnowakow @luacmartins Did you test with hundreds of row or any stress test?

[luacmartins]

I tried it with ~200 rows