1738765 - Isolate (some) ServiceWorkers in separate processes for performance

Status: RESOLVED FIXED

(Core :: DOM: Content Processes, enhancement, P2)

Description

[Randell Jesup [:jesup] (needinfo me)]

Creating and especially doing serviceworker operations can be badly affected by content-process MainThread jank -- since operations bounce from a launcher thread to mainthread and then to the worker thread, running events (especially JS) on MainThread can delay the operation for 100's or 1000's of ms.

Moving time-critical ServiceWorkers to isolated processes can solve this problem, at the cost of a processes-worth of memory (and some time at creation time to specialize the process from the prealloc cache).

In order to experiment with this feature, initially we'll use an allow-list of domains; in the future this will be replaced with heuristics to decide when this is needed (fetch handlers, etc)

Comment 1

[Randell Jesup [:jesup] (needinfo me)]

Attachment: Bug 1738765: Process-isolate ServiceWorkers if they match an allow-list of sites r=nika

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/8ec82114de67
Process-isolate ServiceWorkers if they match an allow-list of sites r=nika,fluent-reviewers,flod

Comment 3

[Iulian Moraru]

https://hg.mozilla.org/mozilla-central/rev/8ec82114de67