Bug: Unusual Background High CPU && Memory Usage on MacBook Intel Machine
Status: RESOLVED
Priority: --
Resolution: DUPLICATE
Created: 2024-05-03 03:16:55+00:00
Resolved: 2024-05-04 12:16:56+00:00

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4.1 Safari/605.1.15

Steps to reproduce:

Device: 

OS: macOS 14.4.1 23E224 x86_64
Host: MacBookPro15,1
Kernel: 23.4.0
Uptime: 2 days, 13 hours, 38 mins
Packages: 91 (brew)
Shell: bash 3.2.57
Resolution: 2560x1440@2x
DE: Aqua
WM: Quartz Compositor
WM Theme: Blue (Dark)
Terminal: iTerm2
Terminal Font: 0xProtoNFM-Regular 18
CPU: Intel i9-8950HK (12) @ 2.90GHz
GPU: Intel UHD Graphics 630, Radeon Pro 560X
Memory: 16395MiB / 32768MiB

1. I opened Thunderbird.
2. Checking several emails, I clicked the Red - x on the top left. Default Mac's close window button. At this moment Thunderbird is not closed, but just running in the background. (By `top` I can see this process is in "sleep" mode.
3. I watched a video on YouTube using Safari.
4. After the video, my Mac's fan keeper running loudly. Through Activity Monitor (Mac built in) and `top` I can see ThunderBird is taking much memory and CPU (see attachment).
5. From Docker I clicked and opened Thunderbird again. The high volume of usage disappeared. 
6. I checked Activity Manager from Devtools of Thunderbird but nothing serious here.

Other Infos:

1. I don't have any adds-on.
2. I linked only Gmail + Google Calendars + Mac's Contacts in ThunderBird.
3. I can reproduce this even in Debug Mode. 

My assumption: ThunderBird might be requesting something in the background, however MacOS rejects it. It keeps requesting. 

Thank you so much for your time and effort developing ThunderBird!


Actual results:

Device: 

OS: macOS 14.4.1 23E224 x86_64
Host: MacBookPro15,1
Kernel: 23.4.0
Uptime: 2 days, 13 hours, 38 mins
Packages: 91 (brew)
Shell: bash 3.2.57
Resolution: 2560x1440@2x
DE: Aqua
WM: Quartz Compositor
WM Theme: Blue (Dark)
Terminal: iTerm2
Terminal Font: 0xProtoNFM-Regular 18
CPU: Intel i9-8950HK (12) @ 2.90GHz
GPU: Intel UHD Graphics 630, Radeon Pro 560X
Memory: 16395MiB / 32768MiB

1. I opened Thunderbird.
2. Checking several emails, I clicked the Red - x on the top left. Default Mac's close window button. At this moment Thunderbird is not closed, but just running in the background. (By `top` I can see this process is in "sleep" mode.
3. I watched a video on YouTube using Safari.
4. After the video, my Mac's fan keeper running loudly. Through Activity Monitor (Mac built in) and `top` I can see ThunderBird is taking much memory and CPU (see attachment).
5. From Docker I clicked and opened Thunderbird again. The high volume of usage disappeared. 
6. I checked Activity Manager from Devtools of Thunderbird but nothing serious here.

Other Infos:

1. I don't have any adds-on.
2. I linked only Gmail + Google Calendars + Mac's Contacts in ThunderBird.
3. I can reproduce this even in Debug Mode. 

My assumption: ThunderBird might be requesting something in the background, however MacOS rejects it. It keeps requesting. 

Thank you so much for your time and effort developing ThunderBird!


Expected results:

Device: 

OS: macOS 14.4.1 23E224 x86_64
Host: MacBookPro15,1
Kernel: 23.4.0
Uptime: 2 days, 13 hours, 38 mins
Packages: 91 (brew)
Shell: bash 3.2.57
Resolution: 2560x1440@2x
DE: Aqua
WM: Quartz Compositor
WM Theme: Blue (Dark)
Terminal: iTerm2
Terminal Font: 0xProtoNFM-Regular 18
CPU: Intel i9-8950HK (12) @ 2.90GHz
GPU: Intel UHD Graphics 630, Radeon Pro 560X
Memory: 16395MiB / 32768MiB

1. I opened Thunderbird.
2. Checking several emails, I clicked the Red - x on the top left. Default Mac's close window button. At this moment Thunderbird is not closed, but just running in the background. (By `top` I can see this process is in "sleep" mode.
3. I watched a video on YouTube using Safari.
4. After the video, my Mac's fan keeper running loudly. Through Activity Monitor (Mac built in) and `top` I can see ThunderBird is taking much memory and CPU (see attachment).
5. From Docker I clicked and opened Thunderbird again. The high volume of usage disappeared. 
6. I checked Activity Manager from Devtools of Thunderbird but nothing serious here.

Other Infos:

1. I don't have any adds-on.
2. I linked only Gmail + Google Calendars + Mac's Contacts in ThunderBird.
3. I can reproduce this even in Debug Mode. 

My assumption: ThunderBird might be requesting something in the background, however MacOS rejects it. It keeps requesting. 

Thank you so much for your time and effort developing ThunderBird!