Investigate: Client-side performance issues on Desktop App in 5.18 release branch

Description

Community-release (5.18 branch) is using a lot of CPU on desktop app (both v4.2 and v4.3) and barely usable. Stark difference to 5.17.

The app is fine at first, but after using it a while, the CPU spikes and the app gets laggy, including channel switch, autocomplete, writing messages, etc. I've had a similar issue before, where it was caused by me having a lot of DMs/GMs

For now, I've had to stop using the desktop app because the perf is so poor and I didn't want to switch to using community. Chrome is okay for the most part

This started on community-release on Monday, most likely timed with the switch to 5.18 release branch

I recorded a short video of what my experience is like while I was in Zoom (ignore first few seconds when I was looking for the share button)

Issue created from a message in Mattermost.

QA Test Steps

See description

Mana

4

Assignee

Sudheer Timmaraju

QA Assignee

None

Reporter

Jason Blais

Epic Link

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Fix versions

Mattermost Team

Apps

Sprint

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QA Testing Areas

Other (write in QA test steps)

GitHub Issue

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Components

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Severity

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