1942557 - Creating a group with 50K radio buttons takes 74 seconds. Selecting a single radio button takes 3 minutes

Status: NEW

(Core :: DOM: Forms, defect)

Description

[Mayank Bansal]

Open the attached testcase.
Click on generate button.
Once the 50k radio-buttons are created, select the first radio-button.

With group: https://share.firefox.dev/4hnrj2s (74s)
Selecting a radio-button in a group: https://share.firefox.dev/42kpOxN (180s)

For comparison, with no radio groups: https://share.firefox.dev/40DwsxA (550ms)

No idea how realistic this use case is. Feel free to WONTFIX/INVALID.

Comment 1

[Mayank Bansal]

Attachment: about:support

Comment 2

[Mayank Bansal]

Chrome creating 50k radio buttons in 1 group and selecting the first button: https://share.firefox.dev/42jmKlm (instant-ish)

Comment 3

[Mayank Bansal]

This is a regression. Finding the range.
Edit:
Bisection:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=4e8d25555f9d9253daae12f37e70b494fe6bc018&tochange=58d067f89f59472dc1a89d573ccebb4850863efa

Suspect: bug 1837540 / bug 1846859

Comment 4

[Mayank Bansal]

Attachment: radiobutton and checkboxes.HTML

Comment 5

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1837540

:avandolder, since you are the author of the regressor, bug 1837540, could you take a look? Also, could you set the severity field?

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