Schedule prerender after something suspends (#30800) #31194
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Adds the concept of a "prerender". These special renders are spawned whenever something suspends (and we're not already prerendering). The purpose is to move speculative rendering work into a separate phase that does not block the UI from updating. For example, during a transition, if something suspends, we should not speculatively prerender siblings that will be replaced by a fallback in the UI until *after* the fallback has been shown to the user. [ghstack-poisoned]
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Stack from ghstack (oldest at bottom):
Adds the concept of a "prerender". These special renders are spawned
whenever something suspends (and we're not already prerendering).
The purpose is to move speculative rendering work into a separate phase
that does not block the UI from updating. For example, during a
transition, if something suspends, we should not speculatively prerender
siblings that will be replaced by a fallback in the UI until after the
fallback has been shown to the user.