[HOLD for payment 2025-02-04] Improve FloatingMessageCounter performance

[OlimpiaZurek]

Background

The FloatingMessageCounter component is used to display the number of unread messages in a chat thread.

Problem

It causes unnecessary re-renders when the user switches workspaces or when modals are opened or closed.

Solution

Wrap the scrollToBottomAndMarkReportAsRead function in useCallback to ensure it is not recreated on every render. This will prevent unnecessary re-renders during workspace switches, modal interactions, and message updates. Wrapping the function in useCallback will ensure it is only recreated when necessary, leading to smoother transitions and more efficient interactions.

Before:

After:

Issue Owner

Current Issue Owner: @mallenexpensify

[melvin-bot]

Triggered auto assignment to @mallenexpensify (Bug), see https://stackoverflow.com/c/expensify/questions/14418 for more details. Please add this bug to a GH project, as outlined in the SO.

[OlimpiaZurek]

Hi! I'm Olimpia from Callstack and I'd like to work on this issue.

[mallenexpensify]

Hi @OlimpiaZurek , is there a discuss about this anywhere in Slack? If so, can you link to it plz? Thx

[OlimpiaZurek]

Hey @mallenexpensify, here is the link to the slack thread: https://callstack-hq.slack.com/archives/C05LX9D6E07/p1736329695333529

[mallenexpensify]

Thanks @OlimpiaZurek ! Assigned.

[melvin-bot]

Triggered auto assignment to @jasperhuangg, see https://stackoverflow.com/c/expensify/questions/7972 for more details.

[melvin-bot]

Reviewing label has been removed, please complete the "BugZero Checklist".

[melvin-bot]

The solution for this issue has been 🚀 deployed to production 🚀 in version 9.0.89-8 and is now subject to a 7-day regression period 📆. Here is the list of pull requests that resolve this issue:

• Add useCallback to avoid unnecessary rerenders of FloatingMessageCounter #54944

If no regressions arise, payment will be issued on 2025-02-04. 🎊

For reference, here are some details about the assignees on this issue:

• @OlimpiaZurek does not require payment (Contractor)

[melvin-bot]

@jasperhuangg @mallenexpensify @OlimpiaZurek The PR fixing this issue has been merged! The following checklist (instructions) will need to be completed before the issue can be closed. Please copy/paste the BugZero Checklist from here into a new comment on this GH and complete it. If you have the K2 extension, you can simply click: [this button]

[hoangzinh]

@mallenexpensify could you help to assign this issue to me? I helped to review the PR #54944

[melvin-bot]

Payment Summary

Upwork Job

• Reviewer: @hoangzinh owed $250 via NewDot
• Contributor: @OlimpiaZurek is from an agency-contributor and not due payment

BugZero Checklist (@mallenexpensify)

• I have verified the correct assignees and roles are listed above and updated the neccesary manual offers
• I have verified that there are no duplicate or incorrect contracts on Upwork for this job (https://www.upwork.com/ab/applicants//hired)
• I have paid out the Upwork contracts or cancelled the ones that are incorrect
• I have verified the payment summary above is correct

[hoangzinh]

BugZero Checklist:

• [Contributor] Classify the bug:

Bug classification

Source of bug:

• 1a. Result of the original design (eg. a case wasn't considered)
• 1b. Mistake during implementation
• 1c. Backend bug
• 1z. Other: It's an improve/enhance issue

Where bug was reported:

• 2a. Reported on production (eg. bug slipped through the normal regression and PR testing process on staging)
• 2b. Reported on staging (eg. found during regression or PR testing)
• 2d. Reported on a PR
• 2z. Other: Slack

Who reported the bug:

• 3a. Expensify user
• 3b. Expensify employee
• 3c. Contributor
• 3d. QA
• 3z. Other: Callstack, expert contributor

• [Contributor] The offending PR has been commented on, pointing out the bug it caused and why, so the author and reviewers can learn from the mistake.

  Link to comment: https://github.com/Expensify/App/pull/18637/files#r1940947117

• [Contributor] If the regression was CRITICAL (e.g. interrupts a core flow) A discussion in #expensify-open-source has been started about whether any other steps should be taken (e.g. updating the PR review checklist) in order to catch this type of bug sooner.

  Link to discussion: N/A

• [Contributor] If it was decided to create a regression test for the bug, please propose the regression test steps using the template below to ensure the same bug will not reach production again.

  Nope, it's just an improvement issue for existing behavior.

[hoangzinh]

Requested payment in ND

[mallenexpensify]

Contributor+: @hoangzinh due $250 via NewDot

Doesn't look like we need a test case or update of one for this, plz comment if you disagree

[garrettmknight]

$250 approved for @hoangzinh