[Webkit-unassigned] [Bug 196208] [GTK][WPE] Disable process warming

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=196208

Michael Catanzaro <mcatanzaro at igalia.com> changed:

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--- Comment #2 from Michael Catanzaro <mcatanzaro at igalia.com> ---
Comment on attachment 365877
  --> https://bugs.webkit.org/attachment.cgi?id=365877
Patch

Process warming should already be disabled because PSON is disabled. Is there a bug in the logic for that?

This is OK as an emergency measure, but the comment needs a FIXME, because this is very bad. Process warming is not optional for us any more than bubblewrap sandboxing is; we have to make them both work together. Without process warming, PSON will be a severe performance penalty. And we have to make PSON work for Spectre mitigation.

I don't think prewarming is fundamentally incompatible with the bubblewrap sandbox. Prewarmed processes should just use the same WebsiteDataStore as their corresponding web view. If the application creates a view with a different WebsiteDataStore, then of course the prewarming will be defeated and a new process will need to be spun up, but that's an unusual case.

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