Thunderbird 68.2.1 on Linux, I can confirm that this issue still exists, with createElementNS() as given above, and the SMTP sending progress bar from bug 742697, and the IMAP loading progress bar in the status bar when switching between folders.
15-20% CPU usage. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/109943 Title: Thunderbird: high CPU usage from progress bars To manage notifications about this bug go to: https://bugs.launchpad.net/thunderbird/+bug/109943/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs