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script: Generate only a single frame during "update the rendering" (#38858)

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Instead of generating a frame for every display list, which might be one
rendered frame per `<iframe>`, generate only a single frame per call to
"update the rendering." This should make rendering more efficient when
there are `<iframe>`s present and also open up optimizations for
non-display list frames.

Testing: This could potentially reduce flashing of content during
rendering
updates, but that is very difficult to test.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
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Martin Robinson 2025-08-26 09:09:10 -07:00 • committed by GitHub
parent 4f68508624
commit e7a963cca0
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6 changed files with 40 additions and 10 deletions
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7
components/script/dom/window.rs
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@ -2111,6 +2111,9 @@ impl Window {
// properly process ScrollBehavior here.
let reflow_phases_run =
self.reflow(ReflowGoal::UpdateScrollNode(scroll_id, Vector2D::new(x, y)));
if reflow_phases_run.needs_frame() {
self.compositor_api().generate_frame();
}
// > If the scroll position did not change as a result of the user interaction or programmatic
// > invocation, where no translations were applied as a result, then no scrollend event fires
@ -2351,7 +2354,9 @@ impl Window {
// iframe size updates.
//
// See <https://github.com/servo/servo/issues/14719>
self.Document().update_the_rendering();
if self.Document().update_the_rendering().needs_frame() {
self.compositor_api().generate_frame();
}
}
pub(crate) fn layout_blocked(&self) -> bool {