Call "Terminate Service Worker" on all workers when all their clients are gone

[Brady Eidson]

Consider calling "Terminate Service Worker" when WebProcesses go away

[Brady Eidson]

Rename for the simplicity of this patch: 
Consider calling "Terminate Service Worker" on all workers when all WebProcesses go away

[youenn fablet]

Created attachment 328272 [details]
Patch

[WebKit Commit Bot]

Comment on attachment 328272 [details]
Patch

Clearing flags on attachment: 328272

Committed r225486: <https://trac.webkit.org/changeset/225486>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Radar WebKit Bug Importer]

<rdar://problem/35836323>

[Geoffrey Garen]

Comment on attachment 328272 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=328272&action=review

> Source/WebCore/workers/service/server/SWServer.cpp:55
> +static Seconds terminationDelay { 60_s };

I think we can make this value a lot smaller.

Starting a worker is less expensive than loading one or more webpages. So, if the user unloads the last page from a given origin, we really aren't that concerned about having to restart the origin's worker later.

I'd suggest something like 5s.

[youenn fablet]

(In reply to Geoffrey Garen from comment #6)
> Comment on attachment 328272 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=328272&action=review
> 
> > Source/WebCore/workers/service/server/SWServer.cpp:55
> > +static Seconds terminationDelay { 60_s };
> 
> I think we can make this value a lot smaller.
> 
> Starting a worker is less expensive than loading one or more webpages. So,
> if the user unloads the last page from a given origin, we really aren't that
> concerned about having to restart the origin's worker later.
> 
> I'd suggest something like 5s.

Maybe 60 is too big indeed, especially if we add another timer to quit the service worker process when there is no longer any running service worker.

That said, we might need some measurements on how much time it will take for a service worker to run and be ready to process fetch events as this may impact page load time.

[youenn fablet]

Reopening to attach new patch.

[youenn fablet]

Created attachment 328474 [details]
Patch

[youenn fablet]

(In reply to youenn fablet from comment #9)
> Created attachment 328474 [details]
> Patch

Reducing from 60_s to 10_s for now.

[WebKit Commit Bot]

Comment on attachment 328474 [details]
Patch

Clearing flags on attachment: 328474

Committed r225533: <https://trac.webkit.org/changeset/225533>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.