Regression or not, it's still an annoying bug. I'm attaching performance data from my older computer, where this is a nuisance. In the two minutes I let Thunderbird run, it fetched less than 1000 emails - which means just a few emails per second (which is not good IMO!).
The latest comment indicates that this would be eCryptfs related - for the record, I'm also running eCryptfs. Seeing the top perf results, it looks like they are crypto related, but I don't think this is the only cause. The fact that it also seems to spend a significant amount of time in pthread_mutex_lock/unlock also looks like a programming error to me. 14,78% thunderbird-bin [kernel.kallsyms] [k] aes_encrypt 3,65% thunderbird-bin libfreebl3.so [.] rijndael_decryptBlock128 3,56% thunderbird-bin libmozsqlite3.so [.] zeroPage 3,50% thunderbird-bin [kernel.kallsyms] [k] aes_decrypt 2,56% thunderbird-bin libpthread-2.15.so [.] pthread_mutex_lock 1,84% thunderbird-bin libpthread-2.15.so [.] __pthread_mutex_unlock_usercnt 1,80% thunderbird-bin [kernel.kallsyms] [k] _raw_spin_unlock_irqrestore 1,75% thunderbird-bin [kernel.kallsyms] [k] __copy_from_user_ll_nozero 1,71% thunderbird-bin libfreebl3.so [.] shaCompress ** Attachment added: "perf.data" https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/927515/+attachment/3221899/+files/perf.data -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927515 Title: thunderbird uses excessive cpu power To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/927515/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
