[Performance][MEDIUM] General performance investigation for opening app from customer profile trace

[hannojg]

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What performance issue do we need to solve?

We had a customer meeting and they had really bad performance. We recorded multiple profile traces with them.
This issue is about the profile trace for app open.

The collection of issues:

• [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 #46590
• [Partially backend issue] [HOLD for payment 2025-01-07] [Performance] Typing in search is very laggy for big accounts #46591
• [Performance] User unable to navigate to chat in search results (slow API call blocks the whole app?) #46593
• [Performance] After clicking on a search result it took 4x OpenReport requests to open the final report #46594
• https://expensify.slack.com/archives/C049HHMV9SM/p1722434442673559
• https://expensify.slack.com/archives/C049HHMV9SM/p1722438425183629

What is the impact of this on end-users?

Slow or completely hanging/blocked app when starting.

List any benchmarks that show the severity of the issue

https://share.firefox.dev/4fgLVcm

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!)

[sakluger]

Hey @hannojg, any updates on this collection of issues?

[hannojg]

Working through the issues one by one, currently working on this one:

• [HOLD for payment 2025-01-07] [Performance] Typing in search is very laggy for big accounts #46591

I will also find someone from my team to help with these performance issues!

[sakluger]

Looks like we are adding some timing performance logging: #46807

[sakluger]

I'm going to change this to a Weekly since it's a tracking issue related to four specific performance investigations.