1355960 - Riot.im burns large amounts of CPU in the background

Status: RESOLVED INCOMPLETE

(Web Compatibility :: Site Reports, defect, P3)

Description

[Jan Alexander Steffens [:heftig]]

Riot.im is a client for the Matrix network and one of the gateways to the Mozilla IRC network.

Starting the release version https://riot.im/app/, switching it to a completely inactive room and letting it sit in a background tab averages about 37.5% CPU use (~9 min CPU time over ~24 min real time) and 1.6G RSS for the associated content process. 

The development version https://riot.im/develop/ is not noticeably different.

I'm joined to about 65 rooms, some of them very large and very active.

It would be great if a solution could be found to at least reduce background CPU usage. IMO the current situation is not acceptable for a chat application that needs to deliver notifications.

Firefox 54.0a2, Arch Linux x86_64, Intel Core i7 6820HK

Comment 1

[Mike Taylor [:miketaylr]]

I'm not sure if this still reproduces, but perhaps someone from the qf team can take a looks.

Comment 2

[Mike Conley (:mconley) (:⚙️)]

Hi heftig, sorry it's taken so long, but is this still an issue? If so, could you try capturing a performance profile following these instructions: https://developer.mozilla.org/en-US/docs/Mozilla/Performance/Reporting_a_Performance_Problem

Comment 3

[Jan Alexander Steffens [:heftig]]

Because of the massive performance issue I've since reduced my use of Riot to a few small rooms. I'm not sure when and if I ever return to heavier usage. I will reopen the bug if I reencounter the problem.