User-Agent: Mozilla/5.0 (X11; Linux i686; rv:6.0a1) Gecko/20110511 Firefox/6.0a1
Build Identifier: Mozilla/5.0 (X11; Linux i686; rv:6.0a1) Gecko/20110511 Thunderbird/3.4a1pre
Something in core has led to a major increase in time Thunderbird with Lightning takes to open. On my hardware 4 seconds with a 2011-05-10-14-comm-central nightly (c-c SourceStamp=11e51879e4f7) vs. approx. 20 seconds with my private build from c-c SourceStamp=a4209b15c186 with a clean new profile.
Steps to Reproduce:
1. Build Thunderbird package from comm-central with --enable-calendar or use an official nightly build > 2011-05-10-14 once it becomes available
2. Extract the content of the package, run thunderbird
3. Install Lightning, restart Thunderbird
Thunderbird takes abnormally long to open after Step 3.
Startup time doesn't increase significantly, at least not much more than twice as without Lightning (Step 2).
Testing platform: Ubuntu 10.10. If the fix must be in core and not in Lightning, I could try to bisect to find the offending commit.
Bisect done, the first "bad" commit is <http://hg.mozilla.org/mozilla-central/rev/bedef853b523> from Bug 513006.
Verified by local backout of <http://hg.mozilla.org/mozilla-central/rev/bedef853b523>.
m-c revision: 427fa3603d4c+
c-c revision: a4209b15c186
The patch from Bug 513006 has been backed out for another reason <http://hg.mozilla.org/mozilla-central/rev/2b649bafb84a>, so marking this bug as fixed (verified by a local build).
I just upgraded from 188.8.131.52 to 8.0, 2011.12.08 and the performance is very slow. With nothing else running it took 21 seconds to start. Lightning is also an add-on.
My experience does not support the statement that TB is faster. This is significantly slower that 184.108.40.206
Other issues will be reported separately.
I would not consider this resolved or fixed in Windows.
System Xp, Sp 3