1958702 - Testcase generating N Document() objects is 15x slower in Firefox (N=1500000)

Status: NEW

(Core :: DOM: Core & HTML, enhancement)

Description

[Mayank Bansal]

Attachment: Document.html

DOM
N=1500000

• Firefox: https://share.firefox.dev/4logcJq (12s to create, 26s in CC)
• Chrome: https://share.firefox.dev/41Z8TjF (795ms)

Comment 1

[Mayank Bansal]

Attachment: Document - DOMParser.html

DomParser
N=150000

• Firefox: https://share.firefox.dev/42gKGnQ (2.1s)
• Chrome: https://share.firefox.dev/42k89o4 (3s)

Comment 2

[Olli Pettay [:smaug][[e-mail]]]

The creation part is dup of https://bugzilla.mozilla.org/show_bug.cgi?id=1844430

Comment 3

[Olli Pettay [:smaug][[e-mail]]]

Oh, the CC part isn't about CC, it is about mozilla::dom::DocGroup::RemoveDocument being very slow if there are lots of documents.

Comment 4

[Mayank Bansal]

(In reply to Olli Pettay [:smaug][[e-mail]] from comment #2)

The creation part is dup of https://bugzilla.mozilla.org/show_bug.cgi?id=1844430

Is that for the first testcase (where we are much slower), or the second testcase (where we are faster)?

Comment 5

[Olli Pettay [:smaug][[e-mail]]]

Both. I don't see the first case taking that much time in creation.