Prewarming a Web process on provisional load is also a small page load time progression on macOS, as long as the low end devices are excluded.
<rdar://problem/113613532>
Pull request: https://github.com/WebKit/WebKit/pull/16515
Committed 266754@main (e8e6228e012b): <https://commits.webkit.org/266754@main> Reviewed commits have been landed. Closing PR #16515 and removing active labels.
Re-opened since this is blocked by bug 260172
Committed 266897@main (718c2384eda5): <https://commits.webkit.org/266897@main>