1875634 - Thunderbird 115.6.1 (64-bit) relentlessly consumes CPU on macOS

Status: RESOLVED INCOMPLETE

(Thunderbird :: Untriaged, defect)

Description

[homocomputeris+git]

Attachment: Screenshot 2024-01-20 at 14.17.21.png

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:121.0) Gecko/20100101 Firefox/121.0

Steps to reproduce:

1. Launch Thunderbird
2. Leave it open

Actual results:

Thunderbird starts consuming all the CPU for hours, heating up macbook and converting it to a turbofan jet

Expected results:

Do not consume all the CPU

Comment 1

[Wayne Mery (:wsmwk)]

Please see bug 1662759 comment 28

Comment 2

[homocomputeris+git]

Please see bug 1662759 comment 28

Doesn't change anything, unfortunately.

Comment 3

[Wayne Mery (:wsmwk)]

Do you have calendars?
Do you see activity in Tools > Activity Manager?
Does this reproduce in Help > Troubleshoot Mode?

Comment 4

[Magnus Melin [:mkmelin]]

Please get a performance profile and share the link - https://support.mozilla.org/en-US/kb/profiling-thunderbird-performance

Comment 5

[Wayne Mery (:wsmwk)]

Reporter, we are very interested in your results.

Comment 6

[Kaur]

I wasn't sure whether to file a separate report or not. I am not using OS X but Linux and have been witnessing similar symptoms for a while. TB version is 115.8. No additional extensions installed (except for a dictionary / speller).

The high cpu usage cycle (although not 100% in my case, but still abnormal) is not everlasting. Sometimes it will end on its own (that is without restarting TB), but I am yet to detect a pattern.

The short version of the problem is that both the abnormal & normal cpu usage periods can last for a long time (I'd say for hours, although I haven't measured). I recorded a profile during one of these high usage periods. See here.

Regards,
Kaur

Comment 7

[Wayne Mery (:wsmwk)]

(In reply to Kaur from comment #6)

I wasn't sure whether to file a separate report or not. I am not using OS X but Linux and have been witnessing similar symptoms for a while. TB version is 115.8. No additional extensions installed (except for a dictionary / speller).

The high cpu usage cycle (although not 100% in my case, but still abnormal) is not everlasting. Sometimes it will end on its own (that is without restarting TB), but I am yet to detect a pattern.

The short version of the problem is that both the abnormal & normal cpu usage periods can last for a long time (I'd say for hours, although I haven't measured). I recorded a profile during one of these high usage periods. See here.

Thanks for the profile. It points to graphics/webrender. Unfortunately it lacks full symbols. To get those symbols you might need https://www.thunderbird.net/

Comment 8

[Wayne Mery (:wsmwk)]

This still needs a performance profile