I upgraded from the latest stable release to Earlybird release v43.0a2 (2015-10-12). I was experiencing the 15 - 20 second hangs with the stable version and can confirm the issue appears resolved with 43.0a2.
Unsure what recent code change resolves the problems. If anyone knows, suggest it be included for backport to a stable release. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/320057 Title: Thunderbird hangs for 10secs when auto-completing address To manage notifications about this bug go to: https://bugs.launchpad.net/thunderbird/+bug/320057/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs