1875577 - Unified folders that are grouped by sort open significantly slower in expand-all state than in collapse-all state

Status: RESOLVED FIXED

(Thunderbird :: Folder and Message Lists, defect, P2)

Description

[Hartmut Welpmann [:welpy-cw]]

Opening a saved search that spans two folders and contains about 8000 messages grouped by sort with all groups expanded takes about 5 times as long as opening it with all groups collapsed. While there may be be some optimization potential in the backend code, the easy solution appears to be to simply open the view in collapse-all state followed by expanding all groups when all messages have been loaded.

Comment 1

[Hartmut Welpmann [:welpy-cw]]

Attachment: Bug 1875577 - Improve performance when opening a cross-folder view grouped by sort in expand-all state. r=#thunderbird-reviewers

Comment 2

[Alessandro Castellani [:aleca]]

Marking wontfix for 115 since we're 6 months away from next year and we can be a bit more aggressive with code changes and improvements without uplifts limitations.
Does this also happen with beta or daily?
We have some improvements that landed there already but weren't uplifted to 115, so it's better to use daily as reference until we hit the 128 beta cycle.

Comment 3

[Hartmut Welpmann [:welpy-cw]]

While I discovered this in 115, I did the mentioned time measurements with the latest artifact build.

Comment 4

[Hartmut Welpmann [:welpy-cw]]

Performance profiles for opening a cross-folder saved search grouped by sort with 8314 messages:

In collapseAll state about 1.7 s delay.
In expandAll state about 8.9 s delay.

This also happens when leaving quick filter. I changed the patch to cover this case as well.

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/comm-central/rev/6428fd9f4e13
Improve performance when opening a cross-folder view grouped by sort in expand-all state. r=mkmelin

Comment 6

[Wayne Mery (:wsmwk)]

fix missing target milestone