warm start about 33 % slower than with Thunderbird 2.0 - 1sec for v3, 0.75s for v2



8 years ago
6 years ago


(Reporter: Simon Bünzli, Unassigned)


(Blocks: 1 bug, {perf, qawanted, regression})

Windows XP
perf, qawanted, regression

Firefox Tracking Flags

(Not tracked)




8 years ago
Thunderbird 3 feels slower to start than version 2. According to my stop-watch, Tb2 took about 0.75s between clicking the icon and having it visible, while Tb3 takes a whole second (which is noticeable as a slight lag).

Also, during startup the cursor switches several times to busy and back, which also makes startup feel less smooth.


8 years ago
Severity: normal → minor
Duplicate of this bug: 532398

Comment 2

8 years ago
Thunderbird 3.0 too slow to be usable. Have used profile files on USB flash drive with Thunderbird 2 successfully with Windows XP and Ubuntu linux for some time. Now with 3.0 any action (eg mouse click on expand folder) takes min 2 seconds with Thunderbird 3.
Would like to see a usable version of 3 but having to revert to V2.x


7 years ago
Severity: normal → minor
Keywords: qawanted
Summary: warm start about 33 % slower than with Thunderbird 2.0 → warm start about 33 % slower than with Thunderbird 2.0 - 1sec for v3, 0.75s for v2

Comment 4

6 years ago
I am still using Thunderbird, although have long ago given up the practice of keeping my profile on a USB stick and swapping between computers.
Currently, not much use for a client-side client except for when travelling outside net coverage, as a backup.
Add-ons are not keeping up with TBird releases. I haven't been able to use a French language spell checker for some time now.

Comment 5

6 years ago
We're now on Version 14.0. 

How is the comparison now?


Comment 6

6 years ago
(In reply to Worcester12345 from comment #5)
> How is the comparison now?

There have been no significant code changes in this regard, so the expected happens: Nothing has changed and Thunderbird 3+ (which includes 14) is still notably slower than Thunderbird 2 (still by about 33%).

Steps to Reproduce:
1. Extract Thunderbird versions and whatever the latest release version is into their own directories and create an empty profile folder for both (e.g. as a subdirectory)
2. Run thunderbird.exe -profile "profile" (replace "profile" with the empty folder created above) for both versions.
3. Create an empty account (e.g. a News&Blogs account) and disable the default application check for both versions.
4. Close both versions and repeat step 2 to compare warm start timings.
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