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LibWeb: Coalesce layouts that happen in response to style changes

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Instead of doing a forced layout synchronously whenever an element's
style is changed, use a zero-timer to do the forced relayout on next
event loop iteration.

This effectively coalesces a lot of layouts and makes many pages such
as GitHub spend way less time doing redundant layout work.
This commit is contained in:
Andreas Kling 2021-01-09 15:07:37 +01:00
parent d56f4f635a
commit 1d75e82101
3 changed files with 14 additions and 1 deletions
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2
Libraries/LibWeb/DOM/Element.cpp
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@ -221,7 +221,7 @@ void Element::recompute_style()
return;
layout_node()->apply_style(*new_specified_css_values);
if (diff == StyleDifference::NeedsRelayout) {
document().force_layout();
document().schedule_forced_layout();
return;
}
if (diff == StyleDifference::NeedsRepaint) {