1403355 - High CPU usage while Google Music tab is active

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect, P3)

Description

[Matt K.]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:58.0) Gecko/20100101 Firefox/58.0
Build ID: 20170926100259

Steps to reproduce:

Play music in Google Music, leave tab active


Actual results:

High CPU usage: https://perfht.ml/2wiy6Er


Expected results:

CPU usage should be lower

Comment 1

[Cristina Badescu [:cbadescu], Experiments QA]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:58.0) Gecko/20100101 Firefox/58.0; Version: 58.0a1
Build ID: 20170929100122

Hello Matt,

I have tested this issue on latest Firefox release version 56.0, latest Nightly build and could not reproduce it. I have accesed https://play.google.com/music/m/Temm2xjzirmmisscwguzxpql24u?t=Gina_-_Argentine_Tango_Orchestra, played one song and let the tab active. The CPU usage values were normal.

Can you please retest this using latest Firefox release and latest Nightly build (https://nightly.mozilla.org/) and report back the results? When doing this, please use a new clean Firefox profile, maybe even safe mode, to eliminate custom settings as a possible cause (https://goo.gl/AR5o9d).

Mike, can you please take a look on the provided Cleopatra profile and see if it helps to find out what caused the issue?

Comment 2

[Mike Conley (:mconley) (:⚙️)]

Looking at the profile, I certainly see some distress in the content process running Google Music. Seems mostly JS-bound... do you happen to have any add-ons installed and enabled?

Could you post your about:support data, please?

Comment 3

[Matt K.]

So testing it more, it seems to come from the animations on the site. Specifically I'm seeing it when the glowing play button is active, on the lower right corner of any of the recommended music on the Google Music home page. I do remember previously having issues elsewhere in the app, I think coming from animations on track progress, but maybe Google removed some fancy animation there. This add-on did help, but also caused some issues so I stopped using it: https://addons.mozilla.org/en-US/firefox/addon/speedy-google-music/

I'll attach my my about:support data as a file.

Thanks for looking into this!

Comment 4

[Matt K.]

Attachment: about:support

Comment 5

[Mike Conley (:mconley) (:⚙️)]

Looking again at the profile, it does seem like there's a very busy animation occurring. Is the tab showing the loading indicator (a back and forth ping pong effect?)

Are you able to take a short screencast of your browser when you're in this state? Something like Jing usually works nicely: https://www.techsmith.com/download/jing/

Comment 6

[Matt K.]

The tab is not showing the loading indicator. Here's a screen cast using Jing (link not tested since I don't have Flash): https://screencast.com/t/qCx9JreM2Br

Playing with this some more, it the tab uses significantly more CPU when active on the built in retina display of my laptop vs active on my external monitor. Could be a graphics acceleration issue? I have an external monitor connected via Thunderbolt, the built in retina display is set to scale differently.

Comment 7

[Mike Conley (:mconley) (:⚙️)]

You're right - there's not much going on there except the play head.

If you disable _all_ of your extensions, does CPU usage improve?

Comment 8

[Matt K.]

Disabling _all_ plugins has little to no affect. Biggest change still happens when moving the window from the built in display to the external monitor.

Comment 9

[Mike Conley (:mconley) (:⚙️)]

To be clear, the Retina display causes higher CPU usage? That's what I'm getting from comment 6. What is the display resolution on the external display?

Comment 10

[Matt K.]

Correct, the built-in Retina display causes higher CPU.

Built-in Display is a 13.3 inch, 2560 x 1600.
External is an Apple Thunderbolt Display, 27 inch, 2560 x 1440.
Graphics processor is Intel Iris 1536 MB.

Comment 11

[Mike Conley (:mconley) (:⚙️)]

Huh. I could imagine a difference if the resolution were drastically different, but these are pretty comparable. Hey mstange, any idea why the Retina display might cause an increase in CPU usage over the external display?

Comment 12

[Markus Stange [:mstange]]

It depends on the window size. If you move a window from the retina display to a non-retina display and don't resize it, then it'll keep its size in logical units, and the actual number of pixels it renders will be smaller (divided by four).

Comment 13

[Firefox Bug Husbandry Bot]

https://wiki.mozilla.org/Bug_Triage/Projects/Bug_Handling/Bug_Husbandry#Move_fix-optionals

Comment 15

[ghorbanpour]

hi, I have a music site https://inahang.ir and usually when managing my site, many tabs open in Firefox. I think the slowness of my site has something to do with this. what is your opinion?