[Webkit-unassigned] [Bug 252413] WebKit is too conservative in its first paint threshold

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=252413

--- Comment #4 from Malte Ubl <malte at vercel.com> ---
This is likely a different threshold than the one to prevent white-paints between navigations (I'm a big fan of that one!)

Here we are talking about Safari not painting for 5 seconds+ while there is stuff to paint and other browsers paint.

Are you aware of a URL that behaves better with the heuristic?

Chrome's heuristic is:
- paint after 65KB
- paint before encountering a sync script tag in HTML body

The latter triggers paints at the right time for React's and Svelte's streaming implementations, because they always emit a script tag when they flush the buffer.

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