1751586 - Bitdefender using 150% CPU whenever user opens a new website

Status: RESOLVED WORKSFORME

(External Software Affecting Firefox :: Other, defect)

Description

[Asif Youssuff]

From: https://www.reddit.com/r/firefox/comments/s9n29s/bitdefender_using_150_cpu_whenever_i_open_a_new/

​​### Basic information

Whenever I open a new website, BitDefender insists on going on turbo and eats up 150 - 250% of my CPU, and the website takes upwards of 10s to load.

Steps to Reproduce:

Open a new website.

Expected Results:

Doesn't seem to be an issue however with 96.0.2.

Actual Results:

CPU goes to 150 - 250% of my CPU, and the website takes upwards of 10s to load.

Profile shows that it is a bit better in troubleshooting mode.

---

Performance recording (profile)

Profile URL:

https://share.firefox.dev/3qNXgt8

Troubleshooting mode profile: https://share.firefox.dev/35d1G4B

System configuration:

OS version: macOS 11.6.2
GPU model: M1
Number of cores: 8
Amount of memory (RAM): 16gb

More information

User says they don't see the same issue on a different machine without Bitdefender.

---

Thanks so much for your help.

Comment 1

[Asif Youssuff]

[Tracking Requested - why for this release]: If this is an issue with Firefox in the latest beta, it would be bad to go to release with a bug with Bitdefender.

Comment 2

[(PTO June 19-July 7) Ryan VanderMeulen]

Radu, do you know if BitDefender has gotten any similar reports?

Comment 3

[Alexandru Trif, Desktop Test Engineering [:atrif]]

Hello! We tried reproducing this issue on macOS 11.6 M1 mini (8gb-2020) and MacBook Air M1 (8gb- 2020) with macOS 11.6.2 but with no luck. We used the Bitdefender Total Security trial (30days license).

On M1 mini we tried reproducing the issue with Firefox 97.0b7 and the latest nightly. I see a CPU increase when opening new sites but no hangs or long site loading time occurs. This can be also seen on 96.0.2. I also tried to reproduce with 97.0b6 DevEdition and installed all addons presented in the attached profiler. CPU increase happens for Firefox process and Firefox web extensions process but I don’t see any CPU increase for Bitdefender or long loading times on webpages. I also loaded neverssl.com and the page loads almost instantly for me. The CPU increases happen with Bitdefender disabled as well.

The issue does not reproduce on M1 MacBook air 11.6.2 either. We tried reproducing with 97.0b6, 97.0b7 and 97.0b7 DevEdition.
If any new information is received or this needs some special scenarios testing please let us know. Thank you!

Comment 4

[Radu Portase]

(In reply to Ryan VanderMeulen [:RyanVM] from comment #2)

Radu, do you know if BitDefender has gotten any similar reports?

Sure, I'll check and reply to this thread if we have any info.

Comment 5

[Radu Portase]

Hello!

We tested internally on multiple configurations and were unable to reproduce the issue with our current market version. We have no similar issues reported in support. We are happy to help the original reporter of the bug if they contact our support and give use some more details about the issue. With current info there is nothing else we can do.

Best wishes to you all and thank you for reporting this to us,
Radu

Comment 6

[(PTO June 19-July 7) Ryan VanderMeulen]

Asif, neither our internal QA nor Bitdefender have been able to reproduce this. Can you ask the original Reddit reporter if they're still seeing issues?

Comment 7

[(PTO June 19-July 7) Ryan VanderMeulen]

Actually, given https://www.reddit.com/r/firefox/comments/s9n29s/bitdefender_using_150_cpu_whenever_i_open_a_new/huftejw/ I'll just close this out as WFM. Thanks everyone for your efforts in investigating.