[Bug]: After activating notifications for the wallet with multiple accounts, the extension experiencing significant slowdown, Send tx may take 20 seconds to submit

[sleepytanya]

Describe the bug

Upon activating notifications for a wallet that has multiple accounts, there is a significant slowdown in the extension's performance. Tasks such as sending transactions could take upwards of 20 seconds, buttons may remain disabled for over 10 seconds, after making all as read the dots, inidicating new norifications do not disappear, switching between networks and other basic flows might also experience delays.

Expected behavior

Screenshots/Recordings

not.mov

Steps to reproduce

1. Not sure if this is a necessary step but I tested with the wallet with multiple (20+) accounts
2. Turn ON Notifications
3. Try to mark them as read through popup
4. Start Send transaction / switch network etc.

Error messages or log output

Detection stage

During release testing

Version

12.1.6.0

Build type

None

Browser

Chrome

Operating system

MacOS

Hardware wallet

No response

Additional context

No response

Severity

No response

[Prithpal-Sooriya]

Oh wow that is awful.

I'll investigate!

[Prithpal-Sooriya]

I am not able to replicate this from a notification perspective.

However tagging @MetaMask/identity in case slowness is due to any profile syncing feature 👀

[sleepytanya]

Consistently reproducing slow performance when turning notifications on:

slow.mov

[Prithpal-Sooriya]

@sleepytanya I have a fix for mark as read, but I don't think this would be the cause for the slowness
#31824

I do know our APIs have been a bit slow recently, but this shouldn't slow down the UI since our API calls are done in the background.

Will do some more digging 😄

[sleepytanya]

@Prithpal-Sooriya Thank you for investigating!

Turning notifications On and Off (there is visible difference in the creating tx speed), I didn't notice any changes with Profile sync On / Off (tried in diff combinations with Notifications):

234.mov