[Due for payment 2025-04-02] [Performance][Search] Opening search for the first time on a big account is causing the app to hang massively

[hannojg]

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What performance issue do we need to solve?

In a customers meeting the customer was trying to open the search for the first time in NewDot. It caused the app to hang up, and it was a very bad user experience (see the recording):

Screen.Recording.2024-07-31.at.16.25.28.mov

What is the impact of this on end-users?

User perception of the app is very bad, as it's super laggy, basically not usable (the browser even warns that the app is hanging).

List any benchmarks that show the severity of the issue

The customer shared a profile trace with us:

Firefox 2024-07-25 10.42 profile.json.gz

(note: the trace also contains other test cases as well)

The customer had ~15k reports loaded in onyx when these tests were conducted, although in focus mode only 6 chats were displayed.

Proposed solution (if any)

None yet, I will go through the profile and see what can be optimised, what exactly caused those lags.

List any benchmarks after implementing the changes to show impacts of the proposed solution (if any)

not available yet

Platforms:

Which of our officially supported platforms is this issue occurring on?

• Android: Native
• Android: mWeb Chrome
• iOS: Native
• iOS: mWeb Safari
• MacOS: Chrome / Safari
• MacOS: Desktop

Version Number: v9.0.11-5
Reproducible in staging?: not tested
Reproducible in production?: yes
Email or phone of affected tester (no customers): customer
Logs: See performance file
Notes/Photos/Videos: See attached video
Expensify/Expensify Issue URL: n/a
Issue reported by: @hannojg
Slack conversation: https://expensify.slack.com/archives/C05LX9D6E07/p1721919928992729

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[melvin-bot]

Auto-assigning issues to engineers is no longer supported. If you think this issue should receive engineering attention, please raise it in #whatsnext.

[hannojg]

cc @sakluger (feel free to assign me as I (or someone from my team) will work on this ticket!)

[marcaaron]

Curious what is happening with this especially to see if it is related to large numbers of reports (seems likely as there are 15k reports). Gonna assign myself in case @hannojg needs any assistance.

[sakluger]

No updates

[sakluger]

No update