1915852 - Document network request scheduling and prioritization system

Status: NEW

(Core :: Networking, task, P3)

Description

[Andrew Creskey [:acreskey]]

Firefox, Necko, and Dom use a complex system to schedule and prioritize network requests.
This includes modules that interact with each other -- supportsPriority, classOfService, thirdPartyTracking, speculativeLoading, and image priority shifting.
And the behaviour changes based on the version of the http protocol being used.

It would be helpful to have these systems documented.

Comment 1

[Andrew Creskey [:acreskey]]

See Chrome Resource Priorities and Scheduling.

Comment 2

[Andrew Creskey [:acreskey]]

Attachment: Bug 1915852 - Document network request scheduling and prioritization system r=#necko-reviewers

Add first draft documentation of our network prioritization so that we can iterate on it and refine it.

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/8d52c30f3b51
Document network request scheduling and prioritization system r=necko-reviewers,valentin DONTBUILD

Comment 4

[Frédéric Wang Nélar]

The "Resource Scheduling and Priority Table" from the initial draft only mentions the effect of fetchpriority on Image and Fetch but it affects more. This hedgedoc (maybe not up-to-date) gives more details: https://notes.igalia.com/s/dGX-j1_7O#Support-for-HTTP2-1

Comment 5

[Cristina Horotan [:chorotan]]

https://hg.mozilla.org/mozilla-central/rev/8d52c30f3b51

Comment 6

[Andrew Creskey [:acreskey]]

First version is published:
https://firefox-source-docs.mozilla.org/networking/http/prioritization.html

Comment 7

[Sean Kim [:sekim]]

Attachment: Bug 1915852 - Update prioritization.html to reflect changes in font fetchpriority adjustments r=acreskey

Comment 8

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/1a336b30076a
Update prioritization.html to reflect changes in font fetchpriority adjustments r=acreskey,necko-reviewers,kershaw DONTBUILD

Comment 9

[Cristina Horotan [:chorotan]]

https://hg.mozilla.org/mozilla-central/rev/1a336b30076a

Comment 10

[Andrew Creskey [:acreskey]]

Attachment: Bug 1915852 - Document fetch priority impact on CSS, JS r=#necko-reviewers

Update prioritization, scheduling to include CSS, JS specifics.

Comment 11

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/af145381f0f5
Document fetch priority impact on CSS, JS r=necko-reviewers,valentin DONTBUILD

Comment 12

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/af145381f0f5

Comment 13

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

The leave-open keyword is there and there is no activity for 6 months.
:smayya, maybe it's time to close this bug?
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