Closed Bug 1571474 Opened 5 years ago Closed 5 years ago

Thunderbird uses excessive cpu

Categories

(Thunderbird :: Untriaged, defect)

Product:
Thunderbird
Component:
Untriaged
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

(Not tracked)

Status:
RESOLVED INCOMPLETE

People

(Reporter: craig44wag, Unassigned)

Details

(Keywords: perf)

User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:68.0) Gecko/20100101 Firefox/68.0

Steps to reproduce:

Thunderbird is started and running for 10 minutes.

Actual results:

After Thunderbird is running for 10 minutes, the computer becomes slow or sluggish. When I inspect Windows Task Manager, Thunderbird is hogging the cpu with between 10-30%.
This is when I am doing nothing in Thunderbird. Thunderbird should be idle.

Expected results:

No matter how long I wait, Thunderbird never stops executing heavily.
I cannot discover what Thunderbird is processing to do.
The problem is resolved only by stopping and re-starting Thunderbird.
My Thunderbird is on the latest level 60.8.0, 32 bit.

Computer, with Thunderbird problem, is running Windows 7 Pro, 64-bit, version 6.1.7601 service pack 1 build 7601

This problem has existed since several levels of Thunderbird have been released.
I have been hoping that a new level of Thunderbird would fix the problem.

Please check tools > activity manager and tools > error console for recurring activity and errors.
Please start Windows in safe mode with networking enabled and Thunderbird in safe mode

If no change please run the performance profiler:

  1. Use Thunderbird 68 or newer - beta or current nightly build
  2. Install profiler add-on into thunderbird - get the add-on file from https://github.com/firefox-devtools/Gecko-Profiler-Addon/blob/master/gecko_profiler.xpi?raw=true and in Tools > add-ons click the gear to install add-on from file
  3. Follow instructions at https://profiler.firefox.com/ Also see videos based on Firefox, but applicable to Thunderbird.
  4. Create a profiler URL and post it here.

And backup your profile before testing.

Keywords: perf
Flags: needinfo?(craig44wag)

Still needs information from reporter. Safe mode is the first step

Status: UNCONFIRMED → RESOLVED
Closed: 5 years ago
Flags: needinfo?(craig44wag)
Resolution: --- → INCOMPLETE

Thank you to those making comments, endeavoring to help solve the issue.

First, I need to report that I bought a new laptop,
installed Thunderbird
and the problem of excessive cpu usage still occurs.

~ Based on the above suggestions
I examined my addons.
There are/were four extensions installed, but all four were indicated to be "disabled":
extra column folders, Lightning, LookOut, and Remember Mismatched Domains.
~ Nevertheless, I "removed" all four extensions.
~ I have no plugins.
~ I have no extensions.

The problem still occurs.

Next, still with no extensions or addons, I tried SAFE MODE;
regrettably, the excessive cpu problem still occurs.
At this moment, the usage is hovering between 9% and 12%

By way of reminder,

  1. The problem does not occur until Thunderbird has been running for at least 10 minutes.
  2. When the problem occurs, it persists even though I am doing nothing in Thunderbird:
    a. I am not sending email
    b. I am not drafting or editing a new email.
    c. There are no tabs open except "Inbox - Local Folders".
  3. I am running Windows 10 (new computer) fully updated and Thunderbird v60.8.0 (32-bit).
  4. The problem is resolved temporarily by stopping and restarting Thunderbird.
    But within about 10 minutes, the problem is back.

I would greatly enjoy and appreciate a tip that leads to a solution.
Thank you.
Kind regards,
Craig

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